Write a Java Program to Calculate the Power of a Number

Calculating the power of a number is a common operation in mathematics and programming.

In Java, we can use the Math.pow() method to calculate the power of a number.

However, if you want to calculate the power of a number without using any built-in methods, you can use a simple algorithm.

To calculate the power of a number, you need to multiply the number by itself n times, where n is the power you want to calculate.

For example, to calculate the power of 2 to the 3rd power (2^3), you need to multiply 2 by itself 3 times (222), which equals 8.

Here is a Java program that calculates the power of a number using a simple algorithm:

import java.util.Scanner;

public class PowerOfNumber {

    public static void main(String[] args) {
        
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter a number: ");
        int num = scanner.nextInt();
        
        System.out.print("Enter the power: ");
        int power = scanner.nextInt();
        
        int result = 1;
        
        for(int i=1; i<=power; i++) {
            result *= num;
        }
        
        System.out.println(num + " to the power of " + power + " is " + result);
    }

}

In this program, we first ask the user to enter a number and the power they want to calculate. We then initialize a variable called result to 1.

We use a for loop to multiply the number by itself n times, where n is the power entered by the user.

We do this by multiplying the num variable by itself and storing the result in the result variable.

We repeat this process for the number of times specified by the power variable.

Finally, we print out the result.

When you run this program and enter a number and a power, it will calculate the power of the number and print out the result.

In conclusion, calculating the power of a number is a simple algorithm that can be implemented in Java using a for loop.

You can also use the built-in Math.pow() method if you want a more efficient way of calculating the power of a number.

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