Module 1 of 8

C Foundations

From the compiler and first program to types, control flow, functions, arrays, strings, and a complete command-line project.

4 lessons

~16 hours

115 XP

Understand what the compiler and linker actually do, write and run your first C program, enable warnings, and set up a minimal reproducible build.

Learn C integer and floating-point types, signedness, formatting, input, branching, and loops without relying on undefined behaviour.

Break programs into functions, pass arrays correctly, and work with null-terminated strings while respecting buffer boundaries.

Build a multi-file calculator with a menu, safe numeric input, division-by-zero handling, modular functions, and a small regression checklist.