How to use malloc to dynamically allocate memory

main.c

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

int main(int argc, char* argv[]) {
    int* p = (int*) calloc(3, sizeof(int));
    
    p[1] = 3;
    p[2] = 90;
    
    printf("The values are %d, %d and %d\n", p[0], p[1], p[2]);
    free(p);
    return 0;
}