exp (<valarray>)

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

template<class Type>
   valarray<Type> exp(
      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 natural exponential of the elements of the input valarray.

Example

// valarray_exp.cpp
// compile with: /EHsc
#include <valarray>
#include <iostream>
#include <iomanip>

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

   valarray<double> va1 ( 9 );
   for ( i = 0 ; i < 9 ; i++ ) 
      va1 [ i ] =  10 * ( 0.25 * i - 1 );
   valarray<double> va2 ( 9 );

   cout << "Initial valarray:";
   for ( i = 0 ; i < 9 ; i++ )
      cout << " " << va1 [ i ];
   cout << endl;

   va2 = exp ( va1 );
   cout << "The natural exponential of the initial valarray is:\n";
   for ( i = 0 ; i < 9 ; i++ )
      cout << va2 [ i ] << endl;
}

Initial valarray: -10 -7.5 -5 -2.5 0 2.5 5 7.5 10
The natural exponential of the initial valarray is:
4.53999e-005
0.000553084
0.00673795
0.082085
1
12.1825
148.413
1808.04
22026.5

Requirements

Header: <valarray>

Namespace: std

See Also

Concepts

<valarray> Members

exp, log, and log10