Question

write a program in java to input a number and check whether it is a automorphicnumber or not.​

Answer 1

Question:-

Write a Java program to input a number and check whether it is a automorphic number or not.

Code:-

A number n is said to be an automorphic number if the square of the number ends with the same digit as the number has.

Consider n=5

n*n=25 and 25 ends with 5.

So, here the code comes.

import java.util.*;

class Automorphic

{

public static void main(String args[])

{

Scanner sc = new Scanner(System.in);

System.out.print("Enter a number: ");

int n=sc.nextInt();

int sq=n*n;

int x=n;

int digits=0;

while(n!=0)

{

digits++;

n/=10;

}

n=x;

int mod=sq%(int)Math.pow(10, digits);

if(mod==n)

System.out.println("Automorphic Number. ");

else

System.out.println("Not an Automorphic Number.");

}

}

Another approach using String function.

import java.util.*;

class Automorphic

{

public static void main(String args[])

{

Scanner sc = new Scanner(System.in);

System.out.print("Enter a number: ");

int n=sc.nextInt();

int sq=n*n;

String s1=n+"";

String s2=sq+"";

if(s2.endsWith(s1))

System.out.println("Automorphic Number. ");

else

System.out.println("Not an Automorphic Number.");

}

}