std::valarray::size (3) Linux Manual Page

std::valarray<T>::size – std::valarray<T>::size

Synopsis

std::size_t size() const;

Returns the number of elements in the valarray.

Parameters

(none)

Return value

Number of elements in the valarray.

Example

// Run this code

#include <iostream>

#include <valarray>
int main()

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

Output:

  Average: 5.5

See also

       changes the size of valarray
resize (public member function)