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valarray pow() function in C++
  • Last Updated : 24 Oct, 2018
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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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