# Java.lang.StrictMath.ulp() Method

## Description

The java.lang.StrictMath.ulp(float f) method returns the size of an ulp of the argument. An ulp of a float value is the positive distance between this floating-point value and the float value next larger in magnitude. Note that for non-NaN x, ulp(-x) == ulp(x).It include these cases −

• If the argument is NaN, then the result is NaN.
• If the argument is positive or negative infinity, then the result is positive infinity.
• If the argument is positive or negative zero, then the result is Float.MIN_VALUE.
• If the argument is ±Float.MAX_VALUE, then the result is equal to 2104.

## Declaration

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

```public static float ulp(float f)
```

## Parameters

f − This is the floating-point value whose ulp is to be returned.

## Return Value

This method returns the size of an ulp of the argument.

NA

## Example

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

```package com.tutorialspoint;

import java.lang.*;

public class StrictMathDemo {

public static void main(String[] args) {

float f1 = 3.71f , f2 = -4.3f, f3 = 0.0f;

// returns the size of an ulp of the argument
float ulpValue = StrictMath.ulp(f1);
System.out.println("Size of ulp of " + f1 + " : " + ulpValue);

ulpValue = StrictMath.ulp(f2);
System.out.println("Size of ulp of " + f2 + " : " + ulpValue);

ulpValue = StrictMath.ulp(f3);
System.out.println("Size of ulp of " + f3 + " : " + ulpValue);
}
}
```

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

```Size of ulp of 3.71 = 2.3841858E-7
Size of ulp of -4.3 = 4.7683716E-7
Size of ulp of 0.0 = 1.4E-45
```
java_lang_strictmath.htm