Intro to computer science, but fun (yes, really)

See why 5M+ people have taken Harvard CS50 on edX. ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ {preheader_text} [edX Logo](~/AAQRxQA~/RgRm0CxMP0R-aHR0cHM6Ly93d3cuZWR4Lm9yZy8_dXRtX3NvdXJjZT1icmF6ZSZ1dG1fbWVkaXVtPWVtYWlsJnV0bV9jYW1wYWlnbj1UdWVzZGF5X0RlZGljYXRlZF9KaXJhXzIwMjMwODI5JnV0bV9jb250ZW50PVN1YmplY3QgTGluZSAxVwNzcGNCCmTnTKftZOgthaRSG3RyaXN0cmFtYmFsZHdpbjkxQGdtYWlsLmNvbVgEAAAAQA~~) [Courses](~/AAQRxQA~/RgRm0CxMP0SPaHR0cHM6Ly93d3cuZWR4Lm9yZy9zZWFyY2g_dGFiPWNvdXJzZSZ1dG1fc291cmNlPWJyYXplJnV0bV9tZWRpdW09ZW1haWwmdXRtX2NhbXBhaWduPVR1ZXNkYXlfRGVkaWNhdGVkX0ppcmFfMjAyMzA4MjkmdXRtX2NvbnRlbnQ9U3ViamVjdCBMaW5lIDFXA3NwY0IKZOdMp-1k6C2FpFIbdHJpc3RyYW1iYWxkd2luOTFAZ21haWwuY29tWAQAAABA) / [Programs](~/AAQRxQA~/RgRm0CxMP0SQaHR0cHM6Ly93d3cuZWR4Lm9yZy9zZWFyY2g_dGFiPXByb2dyYW0mdXRtX3NvdXJjZT1icmF6ZSZ1dG1fbWVkaXVtPWVtYWlsJnV0bV9jYW1wYWlnbj1UdWVzZGF5X0RlZGljYXRlZF9KaXJhXzIwMjMwODI5JnV0bV9jb250ZW50PVN1YmplY3QgTGluZSAxVwNzcGNCCmTnTKftZOgthaRSG3RyaXN0cmFtYmFsZHdpbjkxQGdtYWlsLmNvbVgEAAAAQA~~) / [My Account](~/AAQRxQA~/RgRm0CxMP0SFaHR0cHM6Ly9hdXRobi5lZHgub3JnL2xvZ2luP3V0bV9zb3VyY2U9YnJhemUmdXRtX21lZGl1bT1lbWFpbCZ1dG1fY2FtcGFpZ249VHVlc2RheV9EZWRpY2F0ZWRfSmlyYV8yMDIzMDgyOSZ1dG1fY29udGVudD1TdWJqZWN0IExpbmUgMVcDc3BjQgpk50yn7WToLYWkUht0cmlzdHJhbWJhbGR3aW45MUBnbWFpbC5jb21YBAAAAEA~) [Harvard CS50: Intro to Computer Science. It’s more than a course. It’s an education revolution.](~/AAQRxQA~/RgRm0CxMP0SuaHR0cHM6Ly93d3cuZWR4Lm9yZy9wbHAvaW50cm9kdWN0aW9uLWNvbXB1dGVyLXNjaWVuY2UtaGFydmFyZHgtY3M1MHg_dXRtX3NvdXJjZT1icmF6ZSZ1dG1fbWVkaXVtPWVtYWlsJnV0bV9jYW1wYWlnbj1UdWVzZGF5X0RlZGljYXRlZF9KaXJhXzIwMjMwODI5JnV0bV9jb250ZW50PVN1YmplY3QgTGluZSAxVwNzcGNCCmTnTKftZOgthaRSG3RyaXN0cmFtYmFsZHdpbjkxQGdtYWlsLmNvbVgEAAAAQA~~) CS50 is Harvard University’s renowned, award-winning introductory course in computer science. Our partnership with Harvard means you can take CS50 online through edX — more than 5 million people already have. Ready to experience CS50 for yourself? Enroll in the audit track at no cost, or upgrade to earn a Harvard certificate of completion, receive full course access, and take your career to the next level. [Learn more about CS50](~/AAQRxQA~/RgRm0CxMP0SuaHR0cHM6Ly93d3cuZWR4Lm9yZy9wbHAvaW50cm9kdWN0aW9uLWNvbXB1dGVyLXNjaWVuY2UtaGFydmFyZHgtY3M1MHg_dXRtX3NvdXJjZT1icmF6ZSZ1dG1fbWVkaXVtPWVtYWlsJnV0bV9jYW1wYWlnbj1UdWVzZGF5X0RlZGljYXRlZF9KaXJhXzIwMjMwODI5JnV0bV9jb250ZW50PVN1YmplY3QgTGluZSAxVwNzcGNCCmTnTKftZOgthaRSG3RyaXN0cmFtYmFsZHdpbjkxQGdtYWlsLmNvbVgEAAAAQA~~) [Why is CS50 so popular?](~/AAQRxQA~/RgRm0CxMP0SuaHR0cHM6Ly93d3cuZWR4Lm9yZy9wbHAvaW50cm9kdWN0aW9uLWNvbXB1dGVyLXNjaWVuY2UtaGFydmFyZHgtY3M1MHg_dXRtX3NvdXJjZT1icmF6ZSZ1dG1fbWVkaXVtPWVtYWlsJnV0bV9jYW1wYWlnbj1UdWVzZGF5X0RlZGljYXRlZF9KaXJhXzIwMjMwODI5JnV0bV9jb250ZW50PVN1YmplY3QgTGluZSAxVwNzcGNCCmTnTKftZOgthaRSG3RyaXN0cmFtYmFsZHdpbjkxQGdtYWlsLmNvbVgEAAAAQA~~) One big reason is Professor David Malan. His engaging, high-energy teaching style has earned him celebrity status in the industry. Under Professor Malan, the complex becomes concrete. Dry data sets become group efforts. Coding problems become puzzle games. On edX, you get flexibility when you want it and support when you need it. As a learner in the CS50 intro course, you can: ► Start as a beginner — no prior computer science experience is required. ► Move through the course at your own pace. CS50 on edX empowers you to learn on your schedule. ► Join vibrant CS50 communities on social platforms to connect with other learners for support. Plus, computer science skills are in high demand. Web development is one of the fastest-growing careers in the U.S., with web developer jobs projected to grow 30% through 2031.1 [Photo of Professor Malan teaching](~/AAQRxQA~/RgRm0CxMP0SuaHR0cHM6Ly93d3cuZWR4Lm9yZy9wbHAvaW50cm9kdWN0aW9uLWNvbXB1dGVyLXNjaWVuY2UtaGFydmFyZHgtY3M1MHg_dXRtX3NvdXJjZT1icmF6ZSZ1dG1fbWVkaXVtPWVtYWlsJnV0bV9jYW1wYWlnbj1UdWVzZGF5X0RlZGljYXRlZF9KaXJhXzIwMjMwODI5JnV0bV9jb250ZW50PVN1YmplY3QgTGluZSAxVwNzcGNCCmTnTKftZOgthaRSG3RyaXN0cmFtYmFsZHdpbjkxQGdtYWlsLmNvbVgEAAAAQA~~) [“Malan is wildly popular because he has figured out how to make computer science fun.” from “Why Students Love Harvard’s CS50”, Business Insider](~/AAQRxQA~/RgRm0CxMP0SuaHR0cHM6Ly93d3cuZWR4Lm9yZy9wbHAvaW50cm9kdWN0aW9uLWNvbXB1dGVyLXNjaWVuY2UtaGFydmFyZHgtY3M1MHg_dXRtX3NvdXJjZT1icmF6ZSZ1dG1fbWVkaXVtPWVtYWlsJnV0bV9jYW1wYWlnbj1UdWVzZGF5X0RlZGljYXRlZF9KaXJhXzIwMjMwODI5JnV0bV9jb250ZW50PVN1YmplY3QgTGluZSAxVwNzcGNCCmTnTKftZOgthaRSG3RyaXN0cmFtYmFsZHdpbjkxQGdtYWlsLmNvbVgEAAAAQA~~) [Show off your skills. Upgrade to the verified track for $199.](~/AAQRxQA~/RgRm0CxMP0SuaHR0cHM6Ly93d3cuZWR4Lm9yZy9wbHAvaW50cm9kdWN0aW9uLWNvbXB1dGVyLXNjaWVuY2UtaGFydmFyZHgtY3M1MHg_dXRtX3NvdXJjZT1icmF6ZSZ1dG1fbWVkaXVtPWVtYWlsJnV0bV9jYW1wYWlnbj1UdWVzZGF5X0RlZGljYXRlZF9KaXJhXzIwMjMwODI5JnV0bV9jb250ZW50PVN1YmplY3QgTGluZSAxVwNzcGNCCmTnTKftZOgthaRSG3RyaXN0cmFtYmFsZHdpbjkxQGdtYWlsLmNvbVgEAAAAQA~~) Accountability Receive grades and feedback to ensure you stay on target. Full access View all course content even after the course’s end date. Proof of completion Earn a valuable Harvard certificate you can share with employers. [Close up of person typing](~/AAQRxQA~/RgRm0CxMP0SuaHR0cHM6Ly93d3cuZWR4Lm9yZy9wbHAvaW50cm9kdWN0aW9uLWNvbXB1dGVyLXNjaWVuY2UtaGFydmFyZHgtY3M1MHg_dXRtX3NvdXJjZT1icmF6ZSZ1dG1fbWVkaXVtPWVtYWlsJnV0bV9jYW1wYWlnbj1UdWVzZGF5X0RlZGljYXRlZF9KaXJhXzIwMjMwODI5JnV0bV9jb250ZW50PVN1YmplY3QgTGluZSAxVwNzcGNCCmTnTKftZOgthaRSG3RyaXN0cmFtYmFsZHdpbjkxQGdtYWlsLmNvbVgEAAAAQA~~) [Harvard CS50: Introduction to Computer Science](~/AAQRxQA~/RgRm0CxMP0SuaHR0cHM6Ly93d3cuZWR4Lm9yZy9wbHAvaW50cm9kdWN0aW9uLWNvbXB1dGVyLXNjaWVuY2UtaGFydmFyZHgtY3M1MHg_dXRtX3NvdXJjZT1icmF6ZSZ1dG1fbWVkaXVtPWVtYWlsJnV0bV9jYW1wYWlnbj1UdWVzZGF5X0RlZGljYXRlZF9KaXJhXzIwMjMwODI5JnV0bV9jb250ZW50PVN1YmplY3QgTGluZSAxVwNzcGNCCmTnTKftZOgthaRSG3RyaXN0cmFtYmFsZHdpbjkxQGdtYWlsLmNvbVgEAAAAQA~~) An introduction to the intellectual enterprises of computer science and the art of programming. [Learn more](~/AAQRxQA~/RgRm0CxMP0SuaHR0cHM6Ly93d3cuZWR4Lm9yZy9wbHAvaW50cm9kdWN0aW9uLWNvbXB1dGVyLXNjaWVuY2UtaGFydmFyZHgtY3M1MHg_dXRtX3NvdXJjZT1icmF6ZSZ1dG1fbWVkaXVtPWVtYWlsJnV0bV9jYW1wYWlnbj1UdWVzZGF5X0RlZGljYXRlZF9KaXJhXzIwMjMwODI5JnV0bV9jb250ZW50PVN1YmplY3QgTGluZSAxVwNzcGNCCmTnTKftZOgthaRSG3RyaXN0cmFtYmFsZHdpbjkxQGdtYWlsLmNvbVgEAAAAQA~~) 1[Web Developers and Digital Designers: Job Outlook](~/AAQRxQA~/RgRm0CxMP0S-aHR0cHM6Ly93d3cuYmxzLmdvdi9vb2gvY29tcHV0ZXItYW5kLWluZm9ybWF0aW9uLXRlY2hub2xvZ3kvd2ViLWRldmVsb3BlcnMuaHRtP3V0bV9zb3VyY2U9YnJhemUmdXRtX21lZGl1bT1lbWFpbCZ1dG1fY2FtcGFpZ249VHVlc2RheV9EZWRpY2F0ZWRfSmlyYV8yMDIzMDgyOSZ1dG1fY29udGVudD1TdWJqZWN0IExpbmUgMSN0YWItNlcDc3BjQgpk50yn7WToLYWkUht0cmlzdHJhbWJhbGR3aW45MUBnbWFpbC5jb21YBAAAAEA~), Bureau of Labor Statistics, Occupational Outlook Handbook. Revised September 14, 2022. Retrieved July 26, 2023. ~/AAQRxQA~/RgRm0CxMP0R-aHR0cHM6Ly93d3cuZWR4Lm9yZy8_dXRtX3NvdXJjZT1icmF6ZSZ1dG1fbWVkaXVtPWVtYWlsJnV0bV9jYW1wYWlnbj1UdWVzZGF5X0RlZGljYXRlZF9KaXJhXzIwMjMwODI5JnV0bV9jb250ZW50PVN1YmplY3QgTGluZSAxVwNzcGNCCmTnTKftZOgthaRSG3RyaXN0cmFtYmFsZHdpbjkxQGdtYWlsLmNvbVgEAAAAQA~~ ~/AAQRxQA~/RgRm0CxMP0SGaHR0cHM6Ly93d3cuZmFjZWJvb2suY29tL2VkWD91dG1fc291cmNlPWJyYXplJnV0bV9tZWRpdW09ZW1haWwmdXRtX2NhbXBhaWduPVR1ZXNkYXlfRGVkaWNhdGVkX0ppcmFfMjAyMzA4MjkmdXRtX2NvbnRlbnQ9U3ViamVjdCBMaW5lIDFXA3NwY0IKZOdMp-1k6C2FpFIbdHJpc3RyYW1iYWxkd2luOTFAZ21haWwuY29tWAQAAABA ~/AAQRxQA~/RgRm0CxMP0SHaHR0cHM6Ly90d2l0dGVyLmNvbS9lZFhPbmxpbmU_dXRtX3NvdXJjZT1icmF6ZSZ1dG1fbWVkaXVtPWVtYWlsJnV0bV9jYW1wYWlnbj1UdWVzZGF5X0RlZGljYXRlZF9KaXJhXzIwMjMwODI5JnV0bV9jb250ZW50PVN1YmplY3QgTGluZSAxVwNzcGNCCmTnTKftZOgthaRSG3RyaXN0cmFtYmFsZHdpbjkxQGdtYWlsLmNvbVgEAAAAQA~~ ~/AAQRxQA~/RgRm0CxMP0SOaHR0cHM6Ly93d3cubGlua2VkaW4uY29tL2NvbXBhbnkvZWR4P3V0bV9zb3VyY2U9YnJhemUmdXRtX21lZGl1bT1lbWFpbCZ1dG1fY2FtcGFpZ249VHVlc2RheV9EZWRpY2F0ZWRfSmlyYV8yMDIzMDgyOSZ1dG1fY29udGVudD1TdWJqZWN0IExpbmUgMVcDc3BjQgpk50yn7WToLYWkUht0cmlzdHJhbWJhbGR3aW45MUBnbWFpbC5jb21YBAAAAEA~ ~/AAQRxQA~/RgRm0CxMP0SNaHR0cHM6Ly93d3cuaW5zdGFncmFtLmNvbS9lZHhvbmxpbmU_dXRtX3NvdXJjZT1icmF6ZSZ1dG1fbWVkaXVtPWVtYWlsJnV0bV9jYW1wYWlnbj1UdWVzZGF5X0RlZGljYXRlZF9KaXJhXzIwMjMwODI5JnV0bV9jb250ZW50PVN1YmplY3QgTGluZSAxVwNzcGNCCmTnTKftZOgthaRSG3RyaXN0cmFtYmFsZHdpbjkxQGdtYWlsLmNvbVgEAAAAQA~~ ~/AAQRxQA~/RgRm0CxMP0SHaHR0cHM6Ly93d3cucmVkZGl0LmNvbS9yL2VkWC8_dXRtX3NvdXJjZT1icmF6ZSZ1dG1fbWVkaXVtPWVtYWlsJnV0bV9jYW1wYWlnbj1UdWVzZGF5X0RlZGljYXRlZF9KaXJhXzIwMjMwODI5JnV0bV9jb250ZW50PVN1YmplY3QgTGluZSAxVwNzcGNCCmTnTKftZOgthaRSG3RyaXN0cmFtYmFsZHdpbjkxQGdtYWlsLmNvbVgEAAAAQA~~ ~/AAQRxQA~/RgRm0CxMP0SQaHR0cHM6Ly9lZHguYXBwLmxpbmsvZW1haWwtYXBwLWluc3RhbGw_dXRtX3NvdXJjZT1icmF6ZSZ1dG1fbWVkaXVtPWVtYWlsJnV0bV9jYW1wYWlnbj1UdWVzZGF5X0RlZGljYXRlZF9KaXJhXzIwMjMwODI5JnV0bV9jb250ZW50PVN1YmplY3QgTGluZSAxVwNzcGNCCmTnTKftZOgthaRSG3RyaXN0cmFtYmFsZHdpbjkxQGdtYWlsLmNvbVgEAAAAQA~~ ~/AAQRxQA~/RgRm0CxMP0SPaHR0cHM6Ly9lZHguYXBwLmxpbmsvZW1haWwtYXBwLWluc3RhbD91dG1fc291cmNlPWJyYXplJnV0bV9tZWRpdW09ZW1haWwmdXRtX2NhbXBhaWduPVR1ZXNkYXlfRGVkaWNhdGVkX0ppcmFfMjAyMzA4MjkmdXRtX2NvbnRlbnQ9U3ViamVjdCBMaW5lIDFXA3NwY0IKZOdMp-1k6C2FpFIbdHJpc3RyYW1iYWxkd2luOTFAZ21haWwuY29tWAQAAABA edX is the trusted platform for education and learning. 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