Question

How to sum array elements in C

Answer 1

#include <stdio.h>

int sum_array(int arr[], int len);

int main(void)
{
    int arr[7] = {1, 2, 3, 4, 5, 6, 7}, size;
       
    size = sizeof(arr) / sizeof(int); 
    
    printf("sum = %i", sum_array(arr, size)); // 28
    
    return 0;
}
int sum_array(int arr[], int len)
{
    int i, sum = 0;
    
    for (i = 0; i < len; i++) sum += arr[i];
    
    return sum;
}

/* 
run:

sum = 28

*/

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