C in 100 Seconds: Dynamic Memory — malloc sizeof free | Episode 20

Stack memory is automatic but limited. malloc allocates memory on the heap — you control the size and the lifetime. sizeof tells you how many bytes a type needs. free gives the memory back when you're done. Forget to free and you leak memory. Allocate space for five integers, fill them with values, print them out, then free the block. That's the pattern — malloc to get memory, use it, free to return it. Student code: https://github.com/GoCelesteAI/c-in-100-seconds/tree/main/episode20 What You'll Learn: • malloc — allocate a block of memory on the heap • sizeof — how many bytes a type needs • Using the allocated memory like an array • free — give the memory back to the system • Why forgetting to free causes memory leaks Next: Episode 21 — calloc and realloc #c #programming #100seconds #learnc #malloc #free #heap #memory #sizeof #dynamicallocation #tutorial Tags c malloc, free c, heap allocation c, sizeof c, dynamic memory c, memory management, memory leak, c tutorial 2026, c beginner, 100 seconds, learn c, coding tutorial