accumulate in cpp

1#include <numeric> // Accumulate
2#include <vector> // Vector 
3using namespace std;
4
5int main()
6{
7  vector<int> nums{1,2,3,4,5};
8  int sum = 0;
9  sum = accumulate(nums.begin(), nums.end(), sum);
10  // nums.begin() -> first number in a list 
11  // nums.end() -> last number in a list 
12  // sum -> starting value before accumulating: Here its 0
13}

1accumulate(first, last, sum);
2first, last : first and last elements of range 
3              whose elements are to be added
4              suppose array is 'a'.
5sum :  initial value of the sum
6Eg: int sum=0;
7	accumulate(a.begin(),a.end(),sum);

1    accumulate(start, end, initial_sum);
2