C++ Math scalbn()

The function computes the product of a given number and FLT_RADX raised to the power of exponent.

Suppose a number is 'x' and exponent is 'n':

Syntax

float scalbn(float x, int n);
double scalbn(double x, int n);
long double scalbn(long double x, int n);
double scalbn(integral x, int n);

Parameter

x: The value of the significand.

n: The value of the exponent.

Return value

It returns the product of x and FLT_RADX raised to the power n.

Example 1

Let's see the simple example when the value of x is integer type.

#include <iostream>
#include<math.h>
#include<float.h>
using namespace std;
int main()
{
    int x=4;
    int n=2;
    std::cout << "Value of x is : " <<x<< std::endl;
    cout<<"4 * 2^2 = "<<scalbn(x,n);
    return 0;
}

Output:

Value of x is : 4
4 * 2^2 = 16

In this example, the value of x is 4. Therefore, scalbn() function scales 4 by FLT_RADX raised to the power 2.

Example 2

Let's see the simple example when the value of x is float type.

#include <iostream>
#include<math.h>
#include<float.h>
using namespace std;
int main()
{
     float x=3.4;
     int n=5;
     std::cout << "Value of x is : " <<x<< std::endl;
     cout<<"3.4 * 2^5 = "<<scalbn(x,n);
     return 0;
}

Output: