How to find the sum of elements of an Array using STL in C++?

Here we will see how to find the sum of all element of an array. So if the array is like [12, 45, 74, 32, 66, 96, 21, 32, 27], then sum will be: 405. So here we have to use the accumulate() function to solve this problem. This function description is present inside <numeric> header file.

Example

 Live Demo

#include<iostream> #include<numeric> using namespace std; int main() {    int arr[] = {12, 45, 74, 32, 66, 96, 21, 32, 27};    int n = sizeof(arr) / sizeof(arr[0]);    cout << "Array is like: ";    for (int i = 0; i < n; i++)    cout << arr[i] << " ";    cout << "\nSum of all elements: " << accumulate(arr, arr + n, 0); }

Output

Array is like: 12 45 74 32 66 96 21 32 27 Sum of all elements: 405