MIT Python Course — Lecture 2: Strings, Input/Output, and Branching | Free University Course 2026

This course focuses on the fundamental grammar modules of programming入门, exploring three core themes: string operations, input/output processing, and conditional branches. As the second day of the MIT 6.100L series, it builds upon the setup and basic concepts from the first lecture, further guiding learners from being able to run code to making code capable of making judgments. The highlight is how the instructor translates abstract concepts into executable code examples. String slicing, concatenation, and formatting are the foundation for subsequent data processing; the input/output section establishes the interaction channel between the program and the user; and conditional branches are the cornerstone for constructing complex logical programs. Together, they form the toolkit that beginners must master before completing their first small project. It is suitable for Python beginners, first-year computer science students, and self-learners interested in programming logic who wish to start systematically. Those with some background in other languages are advised to skip the string basics and watch the rest of the video. The total duration is unknown, so it is recommended to pair it with official lecture notes and post-class exercises for synchronous learning, as understanding is more important than just watching.