using malloc for array in c code example

Example 1: malloc int array c

int array_length = 100;
int *array = (int*) malloc(array_length * sizeof(int));

Example 2: malloc in c

#include <stdlib.h>

void *malloc(size_t size);

void exemple(void)
{
  char *string;
  
  string = malloc(sizeof(char) * 5);
  if (string == NULL)
    return;
  string[0] = 'H';
  string[1] = 'e';
  string[2] = 'y';
  string[3] = '!';
  string[4] = '\0';
  printf("%s\n", string);
  free(string);
}

/// output : "Hey!"

Example 3: c malloc array

#define ARR_LENGTH 2097152
int *arr = malloc (ARR_LENGTH * sizeof *arr);