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C - Use of free() function using malloc() Code Example

The code for Use of free() function using malloc()

#include <stdio.h>
#include <stdlib.h>

int main() {
  int* ptr;
  int n = 25;

  // Dynamically allocate memory using malloc()
   ptr = (int*)malloc(n * sizeof(int));

  // Chceck whether memory is allocated or not
  if (ptr == NULL) {
    printf("Memory not allocated \n");
    exit(0);
  }
  printf("Memory allocation is done.\n");

  // Freeing the memory using free() function
  free(ptr);

  printf("Memory freed.");

  return 0;
}

/*
Output:
Memory allocation is done.
Memory freed.
*/