v.begin(), v.end(), auto and accumulate() function in C++ STL.
#Accumulate function in C++ STL# std::accumulate is a function in the C++ STL (Standard Template Library) that allows you to calculate the sum (or product) of a range of elements in a container. The function is declared in the <numeric> header. Syntax: accumulate (InputIterator first, InputIterator last, init); The accumulate function takes an input iterator first and an input iterator last, which define the range of elements to be summed, and an initial value init. Here's an example usage of the std::accumulate function to calculate the sum of elements in a vector. #include <numeric> #include <vector> #include <iostream> int main() { std::vector<int> vec{1, 2, 3, 4, 5}; int sum = std::accumulate(vec.begin(), vec.end(), 0); std::cout << "The sum is " << sum << std::endl; return 0; } OUTPUT: The sum is 15 In this example, vec.begin() returns an iterator to the first element of the std::vector...
