Checking Palindrome in Java: A Comprehensive Guide

Introduction:

In the world of programming, palindromes are intriguing constructs that captivate both beginners and experienced developers alike. A palindrome is a sequence of characters that reads the same forward and backward. In this tutorial, brought to you by CodeWithWable, we'll dive into the concept of palindromes and guide you through the process of writing a Java program to determine whether a given string is a palindrome or not.

Understanding Palindromes:

Before we start coding, let's grasp the essence of palindromes. Whether it's a word, phrase, or number, palindromes remain unchanged when reversed. For instance, "radar," "madam," and "121" are palindromes.

Writing the Palindrome Checker Program:

We'll write a Java program that takes a integer as input and checks whether it's a palindrome or not. Our program will utilize loops and conditional statements to perform this task.

Explanation:

• The program begins by taking an integer input from the user using the Scanner class.
• The isPalindrome function is invoked with the input integer as an argument.
• Inside the isPalindrome function, two variables are initialized: originalNum to store the original input integer, and reversedNum to store the reversed integer.
• A loop iterates while the input integer num is greater than 0:
• The last digit of num is obtained using the modulo operator (num % 10).
• The last digit is added to reversedNum after shifting its digits one place to the left (multiplied by 10).
• The last digit is removed from num by dividing it by 10 (num /= 10).
• After the loop completes, the value of reversedNum contains the digits of the input integer in reverse order.
• The function returns true if originalNum equals reversedNum, indicating the integer is a palindrome; otherwise, it returns false.
• Based on the returned result, the program outputs whether the input integer is a palindrome or not.

This program uses a reverse-digit approach to check if an integer is a palindrome by comparing the reversed digits with the original digits.

Conclusion:

With our Java program, you now have the ability to effortlessly determine whether a integer is a palindrome or not. Understanding and coding for palindromes can expand your programming toolkit and pave the way for solving more complex challenges. Stay tuned to CodeWithWable for more coding guides and insightful tutorials that foster your growth as a programmer.