Java Program to Check Armstrong Number - The Coding Shala

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 In this post, we will learn how to check if a given number is Armstrong Number in Java.

Java Program to Check Armstrong Number

A positive number is called Armstrong Number if the following equation is true:

ab...z = a^n + b^n + .... + z^n

Here, n is the number of digits in the number.

For example, let's take 3 digits Armstrong Number.  

Example 1:
Input: 153
Output: Armstrong Number
Explanation: 
        153 = 1*1*1 + 5*5*5 + 3*3*3
              = 1 + 125 + 27
             = 153

Java Program: 

// Java program to Check Armstrong Number

public class Main {
	
	public static void main(String[] args) { 
		
		// input number to check Armstrong
		int number = 370; 
		
		int sum = 0, temp = number;
		while(temp != 0) {
			int digit = temp % 10;
			temp = temp / 10;
			sum += (digit * digit * digit);
		}
		
		if(sum == number) {
			System.out.println(number + " is a Armstrong number");
		} else {
			System.out.println(number + " is not a Armstrong number");
		}
	}
}

Output: 

370 is a Armstrong number


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