CPP

sum of vector c++

accumulate(a.begin(), a.end(), 0);

sum of vector c++

#include <numeric>

sum_of_elems = std::accumulate(vector.begin(), vector.end(), 0);

how to find the sum of a vector c++

#include <numeric>

 sum_of_elems = std::accumulate(vector.begin(), vector.end(), 0);

sum of vector c++

//Syntax
accumulate(first, last, sum);
accumulate(first, last, sum, myfun); 

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

C++ sum a vector of digits

 // Sum digits in vector
int digit_sum(vector<int> num) {
    int sum = 0;
    for (auto x : num) sum += x;
    return sum;
}