C

16 lessons — from the very basics to pro-level patterns.

Basics

0. Why Learn C?

Operating systems, embedded chips, and the foundation under every language

1. Variables & Data Types

int, char, float — you tell C exactly what goes where

2. Operators & Expressions

Arithmetic, bitwise, and the difference between = and ==

3. Input & Output

printf and scanf — talking to the terminal

4. Conditionals

if, else if, switch — teach your program to decide

for, while, do-while — repeat until you're done

Arrays & Strings

Fixed rows of boxes — declare, fill, and index

7. Strings & Characters

Null-terminated char arrays — C's DIY approach to text

Functions

Prototypes, definitions, and pass-by-value

Pointers & Memory

Addresses, * and & — the superpower (and foot-gun) of C

10. Pointer Arithmetic & Arrays

Why arr[i] is secretly *(arr + i)

11. Dynamic Memory

malloc, calloc, realloc, free — you are the garbage collector

Structs & Files

12. Structs & Typedef

Bundle related data into your own custom types

fopen, fread, fprintf — reading and writing files the C way

Advanced

14. Preprocessor & Macros

#define, #include, #ifdef — code that writes code

15. Function Pointers & Callbacks

Pass behavior around like data — C's version of higher-order functions