sqrt (<valarray>)

Operates on the elements of an input valarray, returning a valarray whose elements are equal to the square root of the elements of the input valarray.

template<class Type>
   valarray<Type> sqrt(
      const valarray<Type>& _Left
   );

Parameters

• _Left
  The input valarray whose elements are to be operated on by the member function.

Return Value

A valarray whose elements are equal to the square root of the elements of the input valarray.

Example

// valarray_sqrt.cpp
// compile with: /EHsc
#include <valarray>
#include <iostream>
#include <cmath>

int main( )
{
   using namespace std;
   int i;

   valarray<double> va1 ( 6 );
   for ( i = 0 ; i < 5 ; i++ )
      va1 [ i ] = i * i;

   cout << "The initial valarray is: ( ";
      for ( i = 0 ; i < 5 ; i++ )
         cout << va1 [ i ] << " ";
   cout << ")." << endl;

   valarray<double> va2 = sqrt ( va1 );
   cout << "The square root of the initial valarray is: ( ";
      for ( i = 0 ; i < 5 ; i++ )
         cout << va2 [ i ] << " ";
   cout << ")." << endl;
}

The initial valarray is: ( 0 1 4 9 16 ).
The square root of the initial valarray is: ( 0 1 2 3 4 ).

Requirements

Header: <valarray>

Namespace: std

See Also

Concepts

<valarray> Members

sqrt and pow