Java Program - Cube Root of a Number


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If a number is multiplied by itself two times ($$n*n*n$$), the final number will be the cube of that number and inding the cube root of a number is inverse operation of cubing the number. If x is the cube root of y, it can be expressed as below:

$$x = \sqrt[3]{y}$$

Alternatively, it can also be expressed as:

$$x^3 = y$$

Example: Using cbrt() method of Java Math Class

The cbrt() method of Java Math class can be used to return cube root of a number.

import java.lang.Math;

public class MyClass {
  public static void main(String[] args) {
	double x = 64;
	double y = 125;

	//cbrt() takes double datatype as argument
	double x1 = Math.cbrt(x);
	double y1 = Math.cbrt(y);
	System.out.println("Cube root of " + x + " is " + x1);
	System.out.println("Cube root of " + y + " is " + y1);
  }
}

Output

Cube root of 16.0 is 4.0
Cube root of 25.0 is 5.0

Example: Using pow() method of Java Math Class

The pow() method of Java Math class can also be used to calculate cube root of a number.

import java.lang.Math;

public class MyClass {
  public static void main(String[] args) {
	double x = 64;
	double y = 125;
	
	//pow() takes double datatype as argument
	double x1 = Math.pow(x, 1/3.);
	double y1 = Math.pow(y, 1/3.);
	System.out.println("Cube root of " + x + " is " + x1);
	System.out.println("Cube root of " + y + " is " + y1);
  }
}

Output

Cube root of 16.0 is 4.0
Cube root of 25.0 is 5.0

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