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std::valarray::sum

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< cpp‎ | numeric‎ | valarray
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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.

Contents

[edit] Parameters

(none)

[edit] Return value

The sum of the elements.

[edit] Example

#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

[edit] See also

applies a function to every element of a valarray
(public member function) [edit]
sums up a range of elements
(function template) [edit]