# Java.lang.StrictMath.scalb() Method

## Description

The java.lang.StrictMath.scalb(float f, int scaleFactor) method returns d × 2scaleFactor rounded as if performed by a single correctly rounded floating-point multiply to a member of the float 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 float scalb(float f, int scaleFactor)
```

## Parameters

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

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

## Return Value

This method returns 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) {

float f1 = 5.0f , f2 = 9.56f, f3 = 0.0f;
int power = 2;

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

float scalbValue = StrictMath.scalb(f1 , power);
System.out.println("value = " + scalbValue1);

scalbValue = StrictMath.scalb(f2 , power);
System.out.println("value = " + scalbValue1);

scalbValue = StrictMath.scalb(f3 , power);
System.out.println("value = " + scalbValue1);
}
}
```

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

```value = 20.0
value = 38.24
value = 0.0
```
java_lang_strictmath.htm