Java Program to Calculate the Power of a Number - The Coding Shala

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 In this post, we will learn how to Calculate the Power of a Number using the loop and Math.pow() method in Java.

Java Program to Calculate the Power of a Number

You have given a number N ( base) and power p (exponent). Write a Java Program to Calculate the power of the number N.

Example 1:
Input: N = 3
          P = 4
Output: 81

Approach 1

Using loop.

Java Program: 

// Java program to calculate power of a number

public class Main {
	
	public static void main(String[] args) { 
		// inputs can be taken using scanner
		int base = 3;
		int exponent = 4;
		
		int power = 1;
		// using loop
		for(int i = 1; i <= exponent; i++) {
			power = power * base;
		}
		
		System.out.println("power(" + base + "," + exponent + ") is: " + power);
	}
}

Approach 2

We can also use Java's inbuilt Math.pow() method to calculate the power.

Java Program: 

// Java program to calculate power of a number

public class Main {
	
	public static void main(String[] args) { 
		// inputs can be taken using scanner
		int base = 3;
		int exponent = 4;
		
		// using Math.pow()
		// pow method will return double
		double power = Math.pow(base, exponent);
		
		System.out.println("power(" + base + "," + exponent + ") is: " + power);
	}
}


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