In the following example, we will sum up all the elements (values) in an array (arr).
Example
C++ Compiler
#include<iostream>using namespace std;
int main()
{
int i, sum =0;
int arr[5] = {1, 2, 3, 4, 5};
for(i=0; i<5; i++)
sum += arr[i];
cout <<"Sum of array: "<< sum;
return0;
}