Calculate the Power of a Number in Java Program

In this article, we will understand how to calculate the power of a number. The power of a number is calculated using a loop and multiplying it by itself multiple times.

Below is a demonstration of the same −

Input

Suppose our input is −

Number : 4
Exponent value : 5

Output

The desired output would be the following i.e. 4⁵

The result is 1024

Algorithm

Step 1 - START
Step 2 – Declare two integer values namely my_input and my_exponent
Step 3 - Read the required values from the user/ define the values
Step 4 – Using a while loop, multiply the input value with itself for n number of times where n is the exponent value. Store the result.
Step 5- Display the result
Step 6- Stop

Example 1

Here, the input is being entered by the user based on a prompt. You can try this example live in ourcoding ground tool .

import java.util.Scanner;
public class Exponents {
   public static void main(String[] args) {
      int my_input , my_exponent;
      System.out.println("Required packages have been imported");
      Scanner my_scanner = new Scanner(System.in);
      System.out.println("A reader object has been defined ");
      System.out.print("Enter the number : ");
      my_input = my_scanner.nextInt();
      System.out.print("Enter the exponent value : ");
      my_exponent = my_scanner.nextInt();
      long my_result;
      my_result = 1;
      while (my_exponent != 0) {
         my_result *= my_input;
         --my_exponent;
      }
      System.out.println("The result is = " + my_result);
   }
}

Output

Required packages have been imported
A reader object has been defined
Enter the number : 4
Enter the exponent value : 5
The result is = 1024

Example 2

Here, the integer has been previously defined, and its value is accessed and displayed on the console.

public class Exponents {
   public static void main(String[] args) {
      int my_input , my_exponent;
      my_input = 4;
      my_exponent = 5;
      System.out.println("The number is defined as " +my_input +" and the exponent is defined as " + my_exponent);
      long my_result;
      my_result = 1;
      while (my_exponent != 0) {
         my_result *= my_input;
         --my_exponent;
      }
      System.out.println("The result is = " + my_result);
   }
}

Output

The number is defined as 4 and the exponent is defined as 5
The result is = 1024