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Digital marketing space, with platforms like upGrad offering similar Online Digital Marketing Programs to help you build expertise.7. Introduction to Digital MarketingAbout the Program:This introductory course covers the basics of digital marketing, providing insights into digital advertising, content creation, SEO, and more. Ideal for beginners, it focuses on key strategies for leveraging digital platforms to reach wider audiences.Skills You’ll Learn: Skill Description Digital Advertising Basics of paid advertising across platforms SEO and Content Creation Optimizing content for search engines and engagement Email Marketing Strategies for creating effective email campaigns Website Analytics Understanding website performance using analytics tools Who Should Opt for This Program? Students or young professionals interested in starting a career in digital marketing. Business owners looking to understand digital marketing strategies. Anyone interested in promoting brands or services onlineFree online courses for adults in domains like content marketing, search engine optimization, and social media marketing are offered by upGrad and are excellent for learning digital marketing from the ground up.8. Basic Business StatisticsAbout the Program:This course covers fundamental concepts in business statistics, focusing on data analysis, probability, regression, and more. It provides the necessary skills to analyze business data and make informed decisions based on statistical insights.Skills You’ll Learn: Skill Description Data Analysis Techniques for analyzing business data Probability Theory Understanding probability and its business applications Regression Analysis Using regression for predicting business outcomes Descriptive Statistics Summarizing and interpreting business data Who Should Opt for This Program? Students pursuing degrees in business or economics. Professionals looking to incorporate statistical analysis into their decision-making processes. Anyone interested in understanding business trends through data analysis.Explore upGrad blog on Basic Fundamentals of Business Statistics offering excellent resources for learning business statistics.9. Introduction to Artificial IntelligenceAbout the Program:This introductory course on AI explores the core concepts and applications of artificial intelligence. You’ll gain an understanding of machine learning, neural networks, and AI's impact on various industries like healthcare, finance, and entertainment.Skills You’ll Learn: Skill Description AI Concepts Learn the fundamental concepts behind AI technologies Machine Learning Introduction to Algorithms Used in AI Neural Networks Understanding how neural networks power AI solutions AI Applications Explore AI's role in various industries like healthcare and finance Who Should Opt for This Program? Students interested in AI and machine learning. Professionals wanting to explore AI applications in their industries. Anyone curious about how AI is transforming the modern world.Upskill with ChatGPT & AI Free Courses is one of the best free online courses for those eager to dive into artificial intelligence on upGrad offering similar foundational AI courses.10. Java Programming for BeginnersAbout the Program:Java is a versatile and widely-used programming language. This beginner-level course covers the basics of Java, including syntax, data structures, and object-oriented programming principles. It provides a solid foundation for anyone looking to pursue a career in software development.Skills You’ll Learn: Skill Description Java Syntax and Basics Learn the fundamental syntax and structure of Java Object-Oriented Programming Master the principles of OOP, including classes and objects Data Structures Understanding and using key data

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Applied.It's important to store and use the return value of the replace() method if you want to work with the modified string.String replaceFirst()Similar to the Java.String.replace() method, this technique replaces the first substring of the string that has a match between the provided regular expression and the given replacement value.Identical to the Java.String.replace() operation, this method also returns a resulting string.Examples of String replace()public class upGrad { public static void main(String[] args) { String originalString1 = "upGrad"; String replacedString1 = originalString1.replace('u', 'U'); System.out.println("Example 1:"); System.out.println("Original string: " + originalString1); System.out.println("Replaced string: " + replacedString1); System.out.println(); String originalString2 = "upGrad"; String replacedString2 = originalString2.replace("Grad", "Skills"); System.out.println("Example 2:"); System.out.println("Original string: " + originalString2); System.out.println("Replaced string: " + replacedString2); System.out.println(); String originalString3 = "upGrad"; String replacedString3 = originalString3.replace("u", "U").replace("p", "P"); System.out.println("Example 3:"); System.out.println("Original string: " + originalString3); System.out.println("Replaced string: " + replacedString3); System.out.println(); String originalString4 = "upGrad"; String replacedString4 = originalString4.replaceAll("[aeiou]", "*"); System.out.println("Example 4:"); System.out.println("Original string: " + originalString4); System.out.println("Replaced string: " + replacedString4); }}Output:The above program demonstrates various examples of using Java's replace() method to replace characters or substrings within a string. Let's go through each example in detail:Example 1: Replacing a single characterIn this example, the original string upGrad is assigned to the originalString1 variable. The replace() method is then used to replace the character 'u' with 'U', resulting in the modified string UpGrad. The original and replaced strings are printed using System.out.println().Example 2: Replacing a substringIn this example, the original string upGrad is assigned to the originalString2 variable. The replace()

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Structures in Java Basic Algorithms Learn to write algorithms in Java for solving problems Who Should Opt for This Program? Students who want to start coding and develop software applications. Professionals looking to learn Java for software development roles. Anyone interested in computer programming and software engineering.The Core Java Basics Course is a fundamental skill in the tech industry, and the free online courses for adults offered by upGrad provide an excellent starting point for mastering this essential programming language.11. Blockchain BasicsAbout the Program:This course covers the fundamentals of blockchain technology, including how it works, its potential applications, and its impact on industries like finance, healthcare, and logistics. It’s a great starting point for anyone interested in understanding the technology behind cryptocurrencies and decentralized systems.Skills You’ll Learn: Skill Description Blockchain Fundamentals Understand how blockchain technology operates Cryptocurrencies Learn about the relationship between blockchain and cryptocurrencies like Bitcoin Distributed Ledger Technology Explore how decentralized systems work using distributed ledgers Blockchain Applications Discover how blockchain is applied across various industries Who Should Opt for This Program? Students or professionals interested in blockchain and its applications. Individuals looking to learn about the future of digital transactions. Anyone curious about the technical foundations of cryptocurrencies.One of the best free online courses to get started with blockchain free online course provided by upGrad offering similar courses for hands-on learning.12. Python for Web DevelopmentAbout the Program:Python is a powerful and versatile language used extensively in web development. This course will teach you how to use Python to build dynamic websites, integrate databases, and deploy web applications.Skills You’ll Learn: Skill Description Python Syntax Learn the core syntax for Python programming Web Development Frameworks Introduction to Django and Flask for building web applications Database Integration Learn how to connect Python to databases for dynamic web apps Web Application Deployment Gain skills to deploy your web projects online Who Should Opt for This Program? Beginners interested in learning Python for web development. Students looking to pursue a career in full-stack development. Anyone wanting to create their own dynamic websites using Python.upGrad offering similar free online courses for adults focused on Python programming.13. Cloud Computing EssentialsAbout the Program:This introductory course covers the fundamentals of cloud computing, including different cloud models like IaaS, PaaS, and SaaS. You will gain an understanding of how cloud services work and their applications in modern business and technology environments.Skills You’ll Learn: Skill Description Cloud Computing Models Learn about IaaS, PaaS, and SaaS models and how they function Cloud Service Providers Understand key players like AWS, Microsoft Azure, and Google Cloud Cloud Infrastructure Learn about managing cloud resources and infrastructure Cloud Security Explore how to secure cloud data and applications Who Should Opt for This Program? Students or professionals aiming for careers in cloud computing. Individuals looking to understand cloud technologies for business solutions. Anyone interested in learning how to use cloud platforms for modern computing needs.If you’re interested in Cloud Computing, this course: Fundamentals of Cloud Computing, is for you!14. Fundamentals of Financial AccountingAbout the. English Upgrade, Reading Upgrade, Math Upgrade, Algebra Upgrade Learning Upgrade

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Method is used to replace the substring "Grad" with "Skills", resulting in the modified string upSkills. Like the previous example, original and replaced strings are printed using System.out.println().Example 3: Replacing multiple charactersIn this example, the original string upGrad is assigned to the originalString3 variable. Chaining multiple replace() methods is applied to replace the characters 'u' and 'p' with their uppercase counterparts, resulting in the modified string UpGrad. The original and replaced strings are then printed using System.out.println().Example 4: Replacing multiple characters using regexIn this example, the original string upGrad is assigned to the originalString4 variable. The replaceAll() method is used with a regular expression [aeiou] to match and replace all vowels with an asterisk (*), resulting in the modified string *pGr*d. Finally, the original and replaced strings are printed using System.out.println().replaceFirst() Methodpublic class upGrad { public static void main(String[] args) { String originalString5 = "upGrad"; String replacedString5 = originalString5.replaceFirst("a", "A"); System.out.println("replaceFirst Example:"); System.out.println("Original string: " + originalString5); System.out.println("Replaced string: " + replacedString5); }}This program begins by defining a class named upGrad. Inside the main method, a string variable originalString5 is declared and assigned the value "upGrad". This variable represents the original string on which the replacement operation will be performed.The replaceFirst() method is then used on originalString5 to replace the first occurrence of the substring "a" with the character "A". The resulting replaced string is stored in the variable replacedString5.Finally, to display the output, the program uses System.out.println() to print the heading "replaceFirst Example:". It then prints the original and

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Systems online.Free online courses for adults like this one provide a solid foundation in cybersecurity, and platforms like upGrad offer advanced courses for deeper knowledge.25. Data Structures and AlgorithmsAbout the Program:This course dives into the fundamentals of data structures and algorithms, which are essential for solving complex programming problems. It’s ideal for anyone looking to pursue a career in software engineering or data science.Skills You’ll Learn: Skill Description Data Structures Learn key data structures like arrays, linked lists, and trees Algorithms Understand basic and advanced algorithms for problem-solving Time and Space Complexity Learn to optimize code by understanding its efficiency Coding Techniques Master coding practices for building scalable software Who Should Opt for This Program? Students interested in software development or computer science. Professionals looking to improve their programming and problem-solving skills. Anyone preparing for technical interviews in programming roles.Build foundational data structure courses and algorithms on upGrad that will offer an in-depth coding courses for career advancement.26. Introduction to E-CommerceAbout the Program:This course covers the basics of e-commerce, including how online retail businesses are set up, managed, and optimized. It’s perfect for individuals interested in starting an online business or managing e-commerce stores.Skills You’ll Learn: Skill Description E-commerce Platforms Learn how to use platforms like Shopify and WooCommerce Online Payment Systems Understand the basics of integrating payment gateways Marketing for E-Commerce Learn how to promote and sell products online Customer Service in E-Commerce Gain insights into handling customer queries and ensuring satisfaction Who Should Opt for This Program? Aspiring entrepreneurs looking to start an e-commerce business. Students or professionals seeking knowledge on online retail management. Anyone interested in working in the fast-growing e-commerce industry.27. Public Speaking and CommunicationAbout the Program:This course focuses on developing public speaking and communication skills. It covers strategies for overcoming stage fright, engaging an audience, and delivering impactful speeches. Perfect for those looking to boost their communication confidence.Skills You’ll Learn: Skill Description Public Speaking Techniques Learn how to deliver clear and engaging presentations Audience Engagement Understand how to connect and engage your audience effectively Body Language Learn how to use body language to enhance your message Overcoming Stage Fright Master techniques to manage nervousness and perform confidently Who Should Opt for This Program? Students aim to improve their speaking and presentation skills. Professionals looking to enhance their communication abilities. Anyone preparing for interviews, public speaking events, or leadership roles.Master public speaking and presentation skills with upGrad, which offers courses that provide practical speaking exercises.28. Startup Basics and Lean ThinkingAbout the Program:This course introduces the concept of lean startup methodology, focusing on how to launch and manage a startup efficiently. It’s perfect for entrepreneurs or anyone interested in the early stages of business development.Skills You’ll Learn: Skill Description Lean Startup Principles Learn how to build and test your business idea quickly and efficiently Business Model Creation Understand how to create and validate a business model Product-Market Fit Learn how to ensure your product fits the market’s needs Scaling Your Startup Gain knowledge on scaling your startup

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Replaced strings by concatenating them with appropriate messages.Exceptions with replace() methodThe replace() method in Java does not throw any exceptions on its own. It is a safe operation that performs string replacement without raising any exceptions. Therefore, we do not need to handle specific exceptions using the replace() method.However, it is important to note that the replace() method creates a new string with the replaced characters and returns it. The original string remains unchanged. So if we wish to store the result of the replace() operation, we must assign it to a variable or use it in some way.Here is an example:In the above example, the replace() method is used to replace the substring "World" with "upGrad". The original string remains unchanged, and the replaced string is stored in the replacedString variable.Code:public class upGrad { public static void main(String[] args) { String originalString = "Hello, World!"; String replacedString = originalString.replace("World", "upGrad"); System.out.println("Original string: " + originalString); System.out.println("Replaced string: " + replacedString); }}ConclusionThere are three methods of replacing a character in String Class Java, namely:replace()replaceAll()replaceFirst()This tutorial discussed changing characters in Java using the replace() method. You can improve your knowledge of different Java concepts by checking out similar tutorials. If you are keenly interested in joining an educational journey on Java, you can go through the courses available on upGrad that will assist you in refining your Java skills.FAQs1. What is the Difference between Replace() and ReplaceAll()?The replaceAll() function replaces all the instances of a given substring's occurrence with any desired

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Once it’s up and running Who Should Opt for This Program? Aspiring entrepreneurs who want to build a successful startup. Students pursuing business or entrepreneurship. Professionals interested in understanding how to launch and scale startups efficiently."The Idea Called upGrad: A Start For Start-Ups" offers a great foundation for entrepreneurs with upGrad offering specialized learning for startup founders.29. Ethical Hacking EssentialsAbout the Program:This course introduces the basics of ethical hacking, teaching how to identify and exploit vulnerabilities in computer systems. It’s ideal for anyone looking to start a career in ethical hacking or cybersecurity.Skills You’ll Learn: Skill Description Hacking Tools and Techniques Learn how to use ethical hacking tools for system security testing Vulnerability Assessment Understand how to identify and mitigate system vulnerabilities Penetration Testing Gain skills to conduct penetration testing on networks and systems Security Protocols Learn about protocols used to secure systems and data Who Should Opt for This Program? Students or professionals looking to enter the field of ethical hacking. Individuals interested in cybersecurity and system protection. Anyone wanting to learn how to identify and fix system vulnerabilities.Read upGrad blog on Ethical hacking for those interested in ethical hacking offering comprehensive learning paths in cybersecurity.30. Introduction to Virtual Reality (VR)About the Program:This course explores the basics of Virtual Reality (VR), including its applications in gaming, healthcare, education, and more. You’ll learn about VR hardware, software, and how to design immersive experiences.Skills You’ll Learn: Skill Description VR Technology Basics Learn about VR hardware and how it creates immersive environments VR Development Tools Get familiar with tools like Unity and Unreal Engine for creating VR experiences Immersive Design Principles Understand the design principles behind creating interactive and engaging VR content VR Applications Explore how VR is used in different industries like education, gaming, and therapy Who Should Opt for This Program? Students or professionals interested in pursuing careers in game development, VR design, or immersive technologies. Creatives who want to build interactive VR experiences. Anyone curious about the future of virtual reality and its impact on various industries.Also Read: What is Virtual Reality Technology to gain insights on advanced learning opportunities in VR development, which can open doors to exciting career paths in immersive technology.Job Opportunities After Completing Free Online Courses in IndiaCompleting free online courses in India opens doors to a wide range of job opportunities across various industries. From data analysis to software development, the following table highlights some of the top career paths you can pursue after completing free online courses, along with job descriptions and average salary expectations in India. Job Title Job Description Average Salary in India Data Analyst Analyze and interpret data to provide actionable insights for businesses and organizations. ₹6L/yr Digital Marketing Specialist Manage online campaigns, SEO, social media, and content marketing strategies to boost online presence. ₹21T/mo Software Developer Build, test, and maintain software applications using programming languages like Java, Python, etc. ₹7L/yr Web Developer Design, develop, and maintain websites and web applications, ensuring they are functional and user-friendly. ₹5L/yr Data Scientist. English Upgrade, Reading Upgrade, Math Upgrade, Algebra Upgrade Learning Upgrade

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Learn concepts from the leading faculty in data, technology and managementBecome an alumni of one of the top universities recognized across industriesAttend on-campus BaseCamps, hackathons and graduation ceremoniesStay on track with your dedicated personal student success mentorGet answers to every doubt through a network of academic fellows via live sessions and discussion forumNetwork, collaborate and learn together with your batchmates from your cohortProjects and case studies from the leading companies in data, technology and digitalWork on real industry problems through sponsored projects and hackathonsGet detailed personalised feedback on every project submissionGet personalized career advice through 1-1 sessions with industry mentorsGet interview ready via resume reviews, practice employment tests and mock interviewsAccess to exclusive job opportunities through our partner companies and hiring drives User Reviews Vibhor Srivastava, ICICI Bank4.5 years experiencePGDDA course from upGrad and IIIT Bangalore has been a boon for me and it has helped enhance my skills in Excel, SQL, R etc.Detailed ReviewRutuja MowadeAnalyst, Nice4 years experienceIt doesn’t matter what your previous working background is, as everything is taught from the basics.Detailed ReviewAnshu SrivastavaResearch Assistant, Nice6 years experienceGroup case studies really give a sense of teamwork, as it happens in regular classroom studies. It teaches us coordination and right attitude as a team player in meeting all the deadlines.Detailed ReviewGangadhar MathyamData Analyst, Tech Mahindra2 years experienceThey will prepare you how to face Data Science job interviews along with this upGrad will also provide mock interviews and mock MCQ tests to check your capability for the interviews.Detailed ReviewREADY TO TRANSFORM YOUR CAREER?Find the best career for you

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Best Free Online Courses in India For Students & Working Professionals[2025] Today, we will provide you with the top free online courses that both students and working professionals can take from the comfort of their homes to enhance their skills. These courses are designed to help you learn at your own pace, whether you're a student looking to upskill or a professional aiming for career growth. Below, you'll find a list of the top 30 free online courses you can take to boost your knowledge and expertise in various fields.1. Introduction to Data ScienceAbout the Program:This course provides a solid foundation in data science, covering essential concepts like data analysis, data visualization, and statistical methods. You’ll learn how to work with real-world data and apply these skills in various domains. This program is ideal for those looking to break into the field of data science with a comprehensive introduction.Skills You’ll Learn: Skill Description Data Analysis Techniques for analyzing and interpreting data Statistical Methods Understanding of statistical models and methods Data Visualization Using tools to represent data visually for insights Programming Basics in Python Basic coding skills required for data manipulation and analysis Who Should Opt for This Program? Aspiring data scientists looking to gain foundational knowledge. Students or professionals wanting to transition into data-driven roles. Anyone with an interest in analytics and data-driven decision-making.Upskill with Data Science is one of the best free online courses also available at upGrad offering similar courses to enhance your data science skills.2. Python for Data ScienceAbout the Program:Python is one of the most widely used languages in data science. This course introduces you to Python programming and teaches you how to use it for data analysis and visualization. By the end of the course, you'll be able to apply Python in real-world data science tasks.Skills You’ll Learn: Skill Description Python Programming Learn Python syntax, data structures, and libraries Data Manipulation Using Python libraries like Pandas for data manipulation Data Visualization Creating charts and plots using Python tools like Matplotlib and Seaborn Statistical Analysis Conducting basic statistical analysis with Python Who Should Opt for This Program? Beginners with no prior experience in programming. Professionals looking to add Python to their skillset for data science. Students who want to learn Python for analytics and data-driven tasks.You can also visit upGrad to provide access to similar courses, helping you Learn Basic Python Programming and beyond.3. Machine Learning for BeginnersAbout the Program:This beginner-friendly course introduces you to machine learning concepts, including supervised and unsupervised learning. It focuses on algorithms and how to apply them to real-world problems. You’ll gain the skills necessary to build machine learning models and understand their applications.Skills You’ll Learn: Skill Description Machine Learning Algorithms Learn algorithms like linear regression, decision trees, and k-nearest neighbors Model Building Hands-on experience with building and testing machine learning models Data Preprocessing Techniques to clean and prepare data for machine learning tasks Model Evaluation Methods for evaluating the performance of machine learning models Who Should Opt for This Program?. English Upgrade, Reading Upgrade, Math Upgrade, Algebra Upgrade Learning Upgrade English Upgrade, Reading Upgrade, Math Upgrade, Algebra Upgrade Learning Upgrade

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Beginners curious about machine learning but without prior knowledge. Students aiming to learn the basics of AI and machine learning. Professionals who want to apply machine learning in their work.Check out: Machine learning free online courses for adults, like those available on upGrad, provide hands-on experience with machine learning, making it easier to apply these concepts in real-world scenarios.4. AI for EveryoneAbout the Program:AI for Everyone is an introductory course designed for non-technical individuals interested in understanding the fundamentals of Artificial Intelligence. You’ll learn how AI works, its applications, and how to think about its implications in various industries.Skills You’ll Learn: Skill Description AI Concepts Understanding the basics of AI and machine learning AI Applications Learn how AI is used in industries like healthcare, finance, and more Ethical Considerations Discuss the ethical implications of AI technologies Who Should Opt for This Program? Non-technical professionals wanting to understand AI. Students interested in exploring the impact of AI on various sectors. Anyone looking to stay updated on the latest technological advancements.Explore Introduction to Generative AI free course at upGrad .This course is part of the growing trend of best free online courses, offering similar foundational AI courses that are perfect for beginners.5. Data Analytics with ExcelAbout the Program:Excel is a powerful tool for data analysis, and this course will teach you how to use Excel for data manipulation, visualization, and analysis. You'll learn to apply Excel's functions and formulas to clean and analyze data, which is crucial for making data-driven decisions in any business environment.Skills You’ll Learn: Skill Description Data Cleaning Techniques to clean and prepare data in Excel Data Visualization Create charts and graphs to represent data trends Excel Functions & Formulas Master key Excel functions and formulas used in data analysis Pivot Tables & Dashboards Using pivot tables and creating dashboards for analysis Who Should Opt for This Program? Students looking to develop data analysis skills for academic or professional use. Professionals aiming to improve their data analysis capabilities using Excel. Anyone who works with large datasets and wants to analyze them efficiently.Introduction to Data Analysis using Excel is one of the best free online courses for adults. Highly perfect for mastering essential tools like Excel for data analytics and gaining a competitive edge.6. Digital Marketing FundamentalsAbout the Program:This course introduces you to the key concepts of digital marketing, including SEO, SEM, email marketing, and social media strategies. You'll learn how to create and implement successful digital marketing campaigns to enhance brand visibility and online presence.Skills You’ll Learn: Skill Description SEO and SEM Techniques to optimize websites for search engines Content Marketing Creating engaging content for digital platforms Social Media Marketing Strategies to grow your brand on social media Data Analytics for Marketing Analyzing digital marketing data to optimize campaigns Who Should Opt for This Program? Students or professionals looking to start a career in digital marketing. Entrepreneurs wanting to promote their business online. Anyone interested in learning about digital marketing tools and techniques.This is for adults interested in the