# Java.lang.Math.cbrt() Method

## Description

The java.lang.Math.cbrt(double a) returns the cube root of a double value. For positive finite x, cbrt(-x) == -cbrt(x); that is, the cube root of a negative value is the negative of the cube root of that value's magnitude. Special cases −

• If the argument is NaN, then the result is NaN.

• If the argument is infinite, then the result is an infinity with the same sign as the argument.

• If the argument is zero, then the result is a zero with the same sign as the argument.

The computed result must be within 1 ulp of the exact result.

## Declaration

Following is the declaration for java.lang.Math.cbrt() method

```public static double cbrt(double a)
```

a − a value.

## Return Value

This method returns the cube root of a.

NA

## Example

The following example shows the usage of lang.Math.cbrt() method.

```package com.tutorialspoint;

import java.lang.*;

public class MathDemo {

public static void main(String[] args) {

// get two double numbers
double x = 125;
double y = 10;

// print the cube roots of three numbers
System.out.println("Math.cbrt(" + x + ")=" + Math.cbrt(x));
System.out.println("Math.cbrt(" + y + ")=" + Math.cbrt(y));
System.out.println("Math.cbrt(-27)=" + Math.cbrt(-27));
}
}
```

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

```Math.cbrt(125)=5.0
Math.cbrt(10)=2.154434690031884
Math.cbrt(-27)=-3.0
```
java_lang_math.htm