number of elements in an array

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


int main()
{

    int arr[10]={0};

    unsigned int num1, num2;

    num1 = sizeof arr/sizeof arr[0];
    num2 = sizeof arr/sizeof *arr;

    printf("%d %d\n", num1, num2);

    return 0;
}

/*
output:

10 10

*/