For loops

#include<stdio.h>
int array[10] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
int sum = 0;
int i;

for (i = 0; i < 10; i++) {
    sum += array[i];
}

/* sum now contains a[0] + a[1] + ... + a[9] */
printf("Sum of the array is %d\n", sum);