Java Program to Calculate Power of a Number

In this article, we will write java programs to calculate power of a number.

1. Program to calculate power of a number using for loop

In this program we are calculating the power of a given number using for loop. Here number is the base and p is the power (exponent). So we are calculating the result of number^p.

public class JavaExample {
    public static void main(String[] args) {
    	//Here number is the base and p is the exponent
        int number = 2, p = 5;
        long result = 1;
        
        //Copying the exponent value to the loop counter
        int i = p;
        for (;i != 0; --i)
        {
            result *= number;
        }
        
        //Displaying the output
        System.out.println(number+"^"+p+" = "+result);
    }
}

Output:

2. Program to calculate power of a number using while loop

Here we are writing the same program that we have seen above using while loop.

public class JavaExample {
    public static void main(String[] args) {
        int number = 5, p = 2;
        long result = 1;
        
        int i=p;
        while (i != 0)
        {
            result *= number;
            --i;
        }
        System.out.println(number+"^"+p+" = "+result);
    }
}

Output:

3. Program to calculate power of a number using pow() function

In the above two programs, we have seen how to calculate power of a number using loops. In the following program, we are using pow() function to calculate power.

public class JavaExample {
    public static void main(String[] args) {
    	int number = 10, p = 3;
        double result = Math.pow(number, p);
        System.out.println(number+"^"+p+" = "+result);
    }
}

Output:

Related Java Examples:

1. Java program to find quotient and remainder
2. Java program to calculate simple interest
3. Java program to calculate compound interest
4. Java program to print Pascal’s Triangle