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std::valarray::sum(3)	      C++ Standard Libary	 std::valarray::sum(3)

NAME
       std::valarray::sum - std::valarray::sum

Synopsis
	  T sum() const;

	  Computes the sum of the elements.

	  The  function	 can be	used only if operator+=	is defined for type T.
       If the
	  std::valarray	is empty, the behavior	is  undefined.	The  order  in
       which the elements
	  are processed	by this	function is unspecified.

Parameters
	  (none)

Return value
	  The sum of the elements.

Example
       // Run this code

	#include <iostream>
	#include <valarray>

	int main()
	{
	    std::valarray<int> a = {1, 2, 3, 4,	5, 6, 7, 8, 9, 10};
	    std::cout << a.sum() << '\n';
	}

Output:
	55

See also
	  apply	     applies a function	to every element of a valarray
		     (public member function)
	  accumulate sums up a range of	elements
		     (function template)

http://cppreference.com		  2022.07.31		 std::valarray::sum(3)

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