Java Program to check for Automorphic Number

Flowchart

package com.kw.sample;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/**
* This Program helps to check entered number is an Automorphic Number or not.
* Example: 25,76 are an Automorphic Number.
*
* @author dsahu1
*
*/
public class KWAutomorphicNumberExample {

/**
* Main Method to execute Program.
*
* @param args
* @throws NumberFormatException
* @throws IOException
*/
public static void main(String[] args) throws NumberFormatException,
IOException {

// Instantiate BufferedReader object
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.print("Enter a Number : ");

// Input number
int num = Integer.parseInt(br.readLine());

// Calculate Square
int sqNumber = num * num;
int numberOfDigit = 0;
int temp = num;
// Find total Digit in Square Number
while (temp > 0) {
numberOfDigit++;
temp = temp / 10;
}
// Calculate digit end with
int calculatedNumber = sqNumber % (int) Math.pow(10, numberOfDigit);

// Validate number with calculatedNumber to check Automorphic Number
if (calculatedNumber == num) {
System.out.println(num + " is an Automorphic Number.");
} else {
System.out.println(num + " is not an Automorphic Number.");
}
}

}

Video Explanation

This video helps to understand flowchart and program which written in the above steps. There are various ways to write a program and we are not covering all of them as this is just for practice. Please post your program in the comment box so other can utilize it.