Pass an Array to a Function

/*
Program to pass an array to a function
*/
  
#include<stdio.h>
void func(int val[]);
main( )
{
    int i, arr[6] = {1, 2, 3, 4, 5, 6};
    func(arr);
    printf("Contents of array are now : ");
    for(i=0; i<6; i++)
        printf("%d ", arr[i]);
    printf("\n");
}

void func(int val[])
{
    int sum=0, i;
    for(i=0; i<6; i++)
    {
        val[i]=val[i]*val[i];
        sum+=val[i];
    }
    printf("The sum of squares  =  %d\n", sum);
}