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Description

This java tutorial shows how to use the pow(double a, double b) method of Math class under java.lang package. 

The method returns the value of the first argument raised to the power of the second argument.

Syntax

double pow(double base, double exponent)

Parameters

Here is the detail of parameters ?

• base ? Any primitive data type.

• exponenet ? Any primitive data type.

Return Value

• This method returns the value of the first argument raised to the power of the second argument.

Example

public class MathPow {

   public static void main(String args[]) {
      double x = 10.635;
      double y = 9.76;

      System.out.printf("The value of e is %.4f%n", Math.E);
      System.out.printf("pow(%.3f, %.3f) is %.3f%n", x, y, Math.pow(x, y));
   }
}

Output

The value of e is 2.7183
pow(10.635, 9.760) is 10494407979.333
Press any key to continue . . .

Example

This java example source code demonstrates the use of pow(double a,double b) method of Math class. Basically we just get the result of raising the base to the exponent both comes from the user input.

import static java.lang.System.*;

import java.util.Scanner;

/*
 * This example source code demonstrates the use of
 * power(double a,double b) method of Math class
 * Get the result of raising the base number to exponent
 */

public class MathPower {

	public static Scanner scan;
	public static void main(String[] args) {
		// ask for user input
		out.print("Enter the base number:");
		scan = new Scanner(System.in);
		// use scanner to get user console input, base
		double baseNumber = scan.nextDouble();
		// use scanner to get user console input, exponent
		out.print("Enter the exponent:");
		scan = new Scanner(System.in);
		double exponent = scan.nextDouble();
		// get the result
		double result = Math.pow(baseNumber, exponent);
		out.println("Result = "+result);
		// close the scanner object to avoid memory leak
		scan.close();

	}

}

Output

Running the power(double a,double b) method example source code of Math class will give you the following output

Enter the base number:2
Enter the exponent:2
Result = 4.0
Press any key to continue . . .

Find power using Math.pow

/*
  Find power using Math.pow
  This java example shows how to find a power using pow method of Java Math class.
*/

public class FindPowerExample {

  public static void main(String[] args) {

    /*
     * To find a value raised to power of another value, use
     * static double pow(double d1, double d2) method of Java Math class.
     */

     //returns 2 raised to 2, i.e. 4
     System.out.println(Math.pow(2,2));

     //returns -3 raised to 2, i.e. 9
     System.out.println(Math.pow(-3,2));
  }
}

Output

4.0
9.0
Press any key to continue . . .

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