C++ Math scalbn() Function

C++ Math scalbn() Function with tutorial for beginners and professionals with examples on isgreaterequal(), less(), islessequal(), islessgreater(), isunordered(), exp(), frexp(), ldexp(), log(), log10(), modf(), exp2(), expm1(), log1p(), log2(), logb(), scalbn(), scalbln() etc.

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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':

scalbn(x,n) = x * ( FLT_RADX)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:

Value of x is : 3.4
3.4 * 2^5 = 108.8

In this example, the value of x is 3.4. Therefore, scalbn() function scales 3.4 by FLT_RADX raised to the power 5.

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