std::valarray<T>:: size

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std::valarray
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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
(public member function)
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