C++ Math scalbln()

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 scalbln(float x, long int n);
double scalbln(double x, long int n);
long double scalbln(long double x, long int n);
double scalbln(integral x, long 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 an integer type.

#include <iostream>
#include<math.h>
#include<float.h>
using namespace std;
int main()
{
 int x=3;
 long n=3L;
 std::cout << "Value of x is: " <<x<< std::endl;
 cout<<"3 * 2^3 = "<<scalbn(x,n);
return 0;
}

Output:

Value of x is: 3
3 * 2^3 = 24

Example 2

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

#include <iostream>
#include<math.h>
#include<float.h>
using namespace std;
int main()
{
 float x=7.2;
 long n=2L;
 std::cout << "Value of x is : " <<x<< std::endl;
 cout<<"7.2 * 2^2 = "<<scalbln(x,n);
 return 0;
}

Output: