# Java.lang.StrictMath.scalb() Method

## Description

The java.lang.StrictMath.scalb(double d, int scaleFactor) method returns d × 2scaleFactor rounded as if performed by a single correctly rounded floating-point multiply to a member of the double value set.It include these cases −

• If the first argument is NaN, NaN is returned. .
• If the first argument is infinite, then an infinity of the same sign is returned.
• If the first argument is zero, then a zero of the same sign is retrned.

## Declaration

Following is the declaration for java.lang.StrictMath.scalb() method

```public static double scalb(double d, int scaleFactor)
```

## Parameters

• d − This is the number to be scaled by a power of two.

• scaleFactor − This is the power of 2 used to scale d.

## Return Value

This method returns the d × 2scaleFactor

NA

## Example

The following example shows the usage of java.lang.StrictMath.scalb() method.

```package com.tutorialspoint;

import java.lang.*;

public class StrictMathDemo {

public static void main(String[] args) {

double d1 = 3.8 , d2 = 4.9, d3 = 0.0;
int power = 2;

// returns (First argument*(pow(second argument,2) i.e d × 2scaleFactor

double scalbValue = StrictMath.scalb(d1, power);
System.out.println("value = " + scalbValue);

scalbValue = StrictMath.scalb(d2, power);
System.out.println("value = " + scalbValue);

scalbValue = StrictMath.scalb(d3, power);
System.out.println("value = " + scalbValue);
}
}
```

Let us compile and run the above program, this will produce the following result −

```value = 15.2
value = 19.6
value = 0.0
```
java_lang_strictmath.htm