12 – Best C program to find sum of all numbers in array

#include<stdio.h>

int sum(int a[],int len)
{
    int rsl=0,i;
    for(i=0;i<len;i++)
    {
        rsl+=a[i];
    }
    return rsl;
}

int main()
{
    int total,nums[] = {45,98,12,65,95,59,29,15,36};
    int l = sizeof(nums)/sizeof(int);
    total = sum(nums,l);
    printf("Sum of all numbers in array is %d",total);
}