valarray pow() function in C++

The pow() function is defined in valarray header file. This function returns a valarray containing the results of the power operation on all the elements, in the same order.
Syntax:

pow(varr, n);

Parameter:

varr: This represents the valarray object.
n: It represents a exponent value.

Returns: This function returns a valarray containing the results of the power operation on all the elements.

Below programs illustrate the above function:

Example 1:-

// C++ program to demonstrate 
// example of pow() function. 
  
#include <bits/stdc++.h> 
using namespace std; 
int main() 
{ 
    // Initializing valarray 
    valarray<int> varr = { -1, 2, 3, 4, -5 }; 
  
    // Declaring new valarray 
    valarray<int> varr1; 
  
    // use of pow() function 
    varr1 = pow(varr, 3); 
  
    // Displaying new elements value 
    cout << "The new valarray with"
         << " manipulated values is : "
         << endl; 
  
    for (int& x : varr1) { 
        cout << x << " "; 
    } 
  
    cout << endl; 
  
    return 0; 
} 

Output:

The new valarray with manipulated values is : 
-1 8 27 64 -125

Example 2:-

// C++ program to demonstrate 
// example of pow() function. 
  
#include <bits/stdc++.h> 
using namespace std; 
int main() 
{ 
    // Initializing valarray 
    valarray<int> varr = { -1, 6, 3, 4, 5 }; 
  
    // Declaring new valarray 
    valarray<int> varr1; 
  
    // use of pow() function 
    varr1 = pow(varr, 2); 
  
    // Displaying new elements value 
    cout << "The new valarray with"
         << " manipulated values is : "
         << endl; 
  
    for (int& x : varr1) { 
        cout << x << " "; 
    } 
  
    cout << endl; 
  
    return 0; 
} 

Output:

The new valarray with manipulated values is : 
1 36 9 16 25

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