Question

Check whether the number is Bouncy number or not using only main method.

Bouncy number is one in which a non-negative integer is neither an increasing number nor a decreasing number.

An increasing number is a non-negative integer in which the digits from left to right are arranged in such a way that no digit on the left is greater than the digit to its right. For example, 1223

A decreasing number is a non-negative integer in which the digits from left to right are arranged in such a way that no digit on the left is smaller than the digit to its right. For example , 3221

Enter the number
1231
1231 is a Bouncy Number
Here 1231 is neither increasing number nor decreasing number so it is a bouncy number.

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Code

import java.util.Scanner;
public class BouncyNumber
{
    public static void main()
    {
        int num=0,temp=0,last=0,digit=0;
        boolean isIncreasing=true,isDecreasing=true;
        Scanner sc=new Scanner(System.in);
        System.out.println("Enter the number");
        num=sc.nextInt();
        //Checking of number being negative is not required
        //as it will not enter in while loop if number is negative integer
        temp=num;

        last=temp%10;
        //This while loop is to check if the number is increasing number
        while(temp>0)
        {
            temp=temp/10;
            digit=temp%10;
            if(last0)
            {
                isIncreasing=false;
                break;
            }
            last=digit;
        }


        temp=num;
        last=temp%10;
        //This while loop is to check if the number is decreasing number
        while(temp>0)
        {

            temp=temp/10;
            digit=temp%10;
            if(last>digit && temp>0)
            {
                isDecreasing=false;
                break;
            }
            last=digit;
        }
        if(isDecreasing==false && isIncreasing==false)
        {
            System.out.println(num+" is a Bouncy Number");
        }
        else
        {
            System.out.println(num+" is not a Bouncy Number");
        }
    }
}