C Code Examples

Low-level imperative systems language focusing on memory control, pointers, and direct hardware interaction. Learn by testing verified runnable code samples, algorithmic walkthroughs, and step-by-step logic explanations.

Math & Numbers

O(√N)

C Program to Check Prime Number

Check whether a given integer is prime in C using optimized trial division with square root boundaries in standard C11.

C Program to Reverse a String Using Pointers

Reverse a null-terminated character array (string) in place using two raw memory pointers without allocating secondary buffers.

Runnable Code

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Memory & Systems

O(N) for reallocation/copying

C Program for Dynamic Memory Allocation (malloc, realloc, free)

Demonstrates safe dynamic heap memory allocation in C, resizing buffers with realloc, and avoiding memory leaks with free().

Runnable Code

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C Code Examples

C Program to Check Prime Number

C Program to Reverse a String Using Pointers

C Program for Dynamic Memory Allocation (malloc, realloc, free)

Platform & Tools

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C Code Examples

C Program to Check Prime Number

C Program to Reverse a String Using Pointers

C Program for Dynamic Memory Allocation (malloc, realloc, free)