How to find the sum of elements of an Array using STL in C++?
Last Updated :
19 Mar, 2019
Given an array arr[], find the sum of the elements of this array using STL in C++.
Example:
Input: arr[] = {1, 45, 54, 71, 76, 12}
Output: 259
Input: arr[] = {1, 7, 5, 4, 6, 12}
Output: 35
Approach: Sum can be found with the help of accumulate() function provided in STL.
Syntax:
accumulate(first_index, last_index, initial value of sum);
Below is the implementation of the above approach:
#include <bits/stdc++.h>
using namespace std;
int main()
{
int arr[] = { 1, 45, 54, 71, 76, 12 };
int n = sizeof (arr) / sizeof (arr[0]);
cout << "Array: " ;
for ( int i = 0; i < n; i++)
cout << arr[i] << " " ;
cout << "\nSum = "
<< accumulate(arr, arr + n, 0);
return 0;
}
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Output:
Array: 1 45 54 71 76 12
Sum = 259
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