C++ Math scalbln() Function

C++ Math scalbln() 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 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':

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

Value of x is : 7.2
7.2 * 2^2 = 28.8

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