accumulate vector c 2b 2b

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}

1//Syntax
2accumulate(first, last, sum);
3accumulate(first, last, sum, myfun); 
4
5first, last : first and last elements of range 
6              whose elements are to be added
7sum :  initial value of the sum
8myfun : a function for performing any 
9        specific task. For example, we can
10        find product of elements between
11        first and last.
12//Example
13  int a[] = {5 , 10 , 15} ;
14  int res = accumulate(a,a+3,0); // 30

1    accumulate(start, end, initial_sum);
2