array lenght in C

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

int main()
{
        int i;
        int arr[4] = {1,2,3,4};
        int l = sizeof(arr)/sizeof(arr[0]);

        for(int i=0;i<sizeof(arr)/sizeof(arr[0]);i++)
        {
                printf(" %d \n",arr[i]);
        }

        return 0;
}