CS50's Introduction to Computer Science

Harvard University's introduction into the intellectual enterprise of computer science and programming for majors and minors, with or without programming experience. CS5x is an entry-level course that David J. Malan teaches. It teaches students how they can think algorithmically and solve problems effectively. The topics include abstraction, algorithms and data structures. C, Python and SQL are all languages. Problem sets are inspired by real-world areas such as finance, cryptography and forensics. Harvard's most popular course is CS5x CS5.

A certificate is available to students who have achieved a satisfactory score in 9 problem sets (i.e. programming assignments). You can take or CS5x at your own pace.

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HarvardX is interested in the science of learning. Register as an online learner for an HX course and you'll also be participating in research on learning. To learn more, read our research statement.

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