Reverse_Number

 Problem Statement

Write a Java program to reverse a given number
Condition

Input will only be a positive interger and will not have any characters
Input

12345

Output

54321

Explanation

    Solution1-Explanation Number modulo 10 will give the last digit as result. (ie., 12345 % 10 = 5). Again dividing the same number by 10 will give the remaining digits except last one. Solution2-Explanation StringBuffer's append method concats the given input to the buffer. StringBuffer's reverse method reverses the contents of the StringBuffer.

code:

import java.util.Scanner;
public class Solution1{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int digit = sc.nextInt();
        sc.close();
        System.out.print("Reverse of the number is ");
        if(digit == 0)
            System.out.print(0);
        else {
            while(digit!=0){
                System.out.print(digit%10);
                digit /= 10;
            }
        }
    }
}

or

public class Solution{

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

int number = input.nextInt();

StringBuffer str=new StringBuffer();

str=str.append(number);

System.out.print("The Reverse of the number is "+ str.reverse());

}

}

import java.util.Scanner;