Last Updated: Mar 27, 2024
Difficulty: Easy

# scalbn() function in C++

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Prerita Agarwal
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23 Jul, 2024 @ 01:30 PM

## Introduction

The scalbn() function is a function in C++ defined in the cmath header file. And hence as the name suggests, scalbn() is used to calculate the x (Product of the given number) and FLT_RADIX raised to the power n. FLT_RADIX(use <cfloat> header file) as mentioned is the value of the radix (integer base) of the exponent representation. This kind of method takes two parameters which are:

1. n: This represents the value of the exponent.
2. x: This represents the value of significand.

### Syntax

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

### Formula

scalbn(x, n) = x * FLT_RADIXn

Return Value: This function will return the product of the given number â€˜xâ€™ and FLT_RADIX raised to the power of n.

Also see, Literals in C, Fibonacci Series in C++

## Example 1

### CODE

``````#include <bits/stdc++.h>
#include <cmath>
#include <cfloat>
using namespace std;

int main()
{
int n = 7;
int x = 5;
int ans;
cout << x << " *  "<< FLT_RADIX << "^"
<< n << " =  "
return 0;
}``````

### OUTPUT

``5 * 2^7 =  640``

Also Read - C++ Interview Questions

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## Example 2

### CODE

``````#include <iostream>
#include <cmath>
#include <cfloat>
using namespace std;
int main ()
{
int n = 13;
//print statement
cout << x << " * " << FLT_RADIX << "^" << n << " =  " << answer << endl;
return 0;
}``````

### OUTPUT

``3.056 * 2^13 =  25034.8``

You practice by yourself with the help of online c++ compiler.

Must Read Dynamic Binding in C++

#### What is scalbn() function?

Scalbn() is used to calculate the x (Product of the given number) and FLT_RADIX raised to the power n.

#### Where is the scalbn() function defined?

The scalbn() function is a function in C++ defined in the cmath header file.

#### What is the return value of this function?

This function will return the product of the given number â€˜xâ€™ and FLT_RADIX raised to the power of n.

## Conclusion

This article extensively discussed the C++ Program for scalbn() function. We hope that this blog has helped you gain more knowledge regarding scalbn() and other functions, check out our articles on Coding Ninjas.

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Topics covered
1.
Introduction
1.1.
Syntax
1.2.
Formula
2.
Example 1
2.1.
CODE
2.2.
OUTPUT
3.
Example 2
3.1.
CODE
3.2.
OUTPUT
4.