Question

Print all the Bouncy numbers in a given range.

A 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 Lower Range
100
Enter Upper Range
120
Bouncy Numbers between 100 and 120:
101 102 103 104 105 106 107 108 109 1

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Code

				
					import java.util.Scanner;
public class BouncyNumberInRange
{
    public static void main()
    {
        int temp=0,last=0,digit=0,lowerRange=0,upperRange=0,i=0;
        boolean isIncreasing=true,isDecreasing=true;
        Scanner sc=new Scanner(System.in);
        System.out.println("Enter Lower Range");
        lowerRange=sc.nextInt();
        System.out.println("Enter Upper Range");
        upperRange=sc.nextInt();
        System.out.println("Bouncy Numbers between "+lowerRange+" and "+upperRange+":");
        for(i=lowerRange;i<=upperRange;i++)
        {
            //Checking of number being negative is not required 
            //as it will not enter in while loop if number is negative integer
            temp=i;
            //This while loop is to check if the number is increasing number
            last=temp%10;
            while(temp>0)
            {
                temp=temp/10;
                digit=temp%10;
                if(last0)
                {
                    isIncreasing=false;
                    break;
                }
                last=digit;
            }

            //This while loop is to check if the number is decreasing number
            temp=i;
            last=temp%10;
            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.print(i+" ");   
            }
            isIncreasing=true;
            isDecreasing=true;
        }

    }
}