Calculate power of integer number in java (example)

• Given a integer number, find out the power of given number.

Methods to calculate power of given number.

• Calculate power of number using while loop method.
• Find out power using JDK Math class

Examples to find power of integer number in java

Example 1 : calculate power of input number : 4²

Enter base number : 4
Enter power number : 2

Power of number = 4² = 16

Example 2 :

Enter base number : 10
Enter power number : 3

Power of number = 10³ = 1000

Program: calculate power of integer using loop & JDK method

package org.learn;

import java.util.Scanner;

public class PowerOfNumber {

    private static int powerUsingLoop(int baseNumber, int power) {

        int outputNumber = 1;
        int index = 0;
        while (index < power) {
            outputNumber = baseNumber * outputNumber;
            index++;
        }

        return outputNumber;
    }

    private static int powerMathClass(int baseNumber, int power) {
        return (int) Math.pow(baseNumber, power);
    }

    public static void main(String[] args) {

        try (Scanner scanner = new Scanner(System.in)) {
            System.out.print("Enter base number : ");
            int baseNumber = scanner.nextInt();

            System.out.print("Enter power number : ");
            int power = scanner.nextInt();

            int powerResult = powerUsingLoop(baseNumber,power);

            System.out.println("Power of number using Loop :"
                                            +powerResult);

            powerResult = powerMathClass(baseNumber,power);

            System.out.println("Power of number using Math class :"
                                             +powerResult);
        }
    }
}

Output: calculate power of integer using loop & JDK method

Enter base number : 4
Enter power number : 2
Power of number using Loop :16
Power of number using Math class :16

************************************************
Enter base number : 10
Enter power number : 3
Power of number using Loop :1000
Power of number using Math class :1000