Java: Check if a number is palindrome or not

Last update on March 11 2025 11:10:04 (UTC/GMT +8 hours)

Check Palindrome Number

Write a Java program to check if a number is a palindrome or not.

In number system a palindromic number is a number that is the same when written forwards or backwards, i.e., of the form.
The first few palindromic numbers are therefore are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 22, 33, 44, 55, 66, 77, 88, 99, 101, 111, …

Test Data
Input a number: 5

Pictorial Presentation:

Sample Solution:

Java Code:

import java.util.Scanner;
public class Example24  {

    public static void main(String args[])
    {
	 Scanner in = new Scanner(System.in);
     System.out.print("Input a number: ");
     int n = in.nextInt();
     int sum = 0, r;
	 int temp = n;    
     while(n>0)
	   {    
        r = n % 10;   
        sum = (sum*10)+r;    
        n = n/10;    
       }    
      if(temp==sum)    
        System.out.println("It is a Palindrome number.");    
      else    
        System.out.println("Not a palindrome");    
     }  
}

Sample Output:

Input a number: 5                                                                                             
It is a Palindrome number.

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Java program to check if a number is a palindrome without converting it to a string by reversing its digits arithmetically.
• Write a Java program to reverse an integer using recursion and compare it to the original number.
• Write a Java program to count palindromic numbers in an array using iterative methods.
• Write a Java program to implement a palindrome checker for numbers using a stack to simulate digit reversal.

Java Code Editor:

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