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JavaScript Program to Check Palindrome Number

Updated on Nov 21, 2024
By Mari Selvan
πŸ‘οΈ 430 - Views
⏳ 4 mins
πŸ’¬ 1 Comment
JavaScript Program to Check Palindrome Number

Photo Credit to CodeToFun

πŸ™‹ Introduction

In the realm of programming, tasks involving numbers often include checking for special properties. One interesting property is whether a number is a palindrome.

A palindrome number reads the same backward as forward.

In this tutorial, we will explore a JavaScript program designed to check whether a given number is a palindrome.

The program involves reversing the digits of the number and comparing it with the original number.

πŸ“„ Example

Let's delve into the JavaScript code that accomplishes this task.

isPalindrome.js
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// Function to check if a number is a palindrome
function isPalindrome(number) {
  const originalNumber = number;
  let reversedNumber = 0,
    remainder;

  // Reverse the digits of the number
  while (number !== 0) {
    remainder = number % 10;
    reversedNumber = reversedNumber * 10 + remainder;
    number = Math.floor(number / 10);
  }

  // If the reversed number is equal to the original number, it is a palindrome
  return originalNumber === reversedNumber;
}

// Driver program
// Replace this value with the number you want to check
const number = 121;

// Call the function to check if the number is a palindrome
if (isPalindrome(number)) {
  console.log(`${number} is a palindrome number.`);
} else {
  console.log(`${number} is not a palindrome number.`);
}

πŸ’» Testing the Program

To test the program with different numbers, modify the value of number in the code.

Output
121 is a palindrome number.

Run the script to check if the specified number is a palindrome.

🧠 How the Program Works

  1. The program defines a function isPalindrome that takes a number as input and returns true if the number is a palindrome, and false otherwise.
  2. Replace the value of number in the main program with the desired number you want to check.
  3. The program calls the isPalindrome function and prints the result using console.log.

πŸ“ Between the Given Range

Let's delve into the javascript code that checks for palindrome numbers in the range 100 to 200.

isPalindrome.js
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// Function to check if a number is palindrome
function isPalindrome(number) {
  const originalNumber = number;
  let reversedNumber = 0,
    remainder;

  while (number !== 0) {
    remainder = number % 10;
    reversedNumber = reversedNumber * 10 + remainder;
    number = Math.floor(number / 10);
  }

  return originalNumber === reversedNumber;
}

// Check palindrome numbers in the range of 100 to 200
const startRange = 100;
const endRange = 200;

console.log("Palindrome Numbers in the range 100 to 200:");

for (let i = startRange; i <= endRange; i++) {
  if (isPalindrome(i)) {
    process.stdout.write(i + " ");
  }
}

console.log();

πŸ’» Testing the Program

Output
Palindrome Numbers in the range 100 to 200:
101 111 121 131 141 151 161 171 181 191

Run the script to see the palindrome numbers in the range of 100 to 200.

🧠 How the Program Works

  1. The program defines a function isPalindrome that checks if a given number is a palindrome.
  2. Inside the function, it reverses the digits of the number and compares it with the original number.
  3. The main section checks for palindrome numbers in the specified range (100 to 200) and prints the results.

🧐 Understanding the Concept of Odd Number

Before delving into the code, let's understand the concept of palindrome numbers. A palindrome number reads the same backward as forward.

For example, 121 is a palindrome number.

🎒 Optimizing the Program

While the provided program is effective, consider exploring and implementing alternative approaches or optimizations for checking palindrome numbers.

Feel free to incorporate and modify this code as needed for your specific use case. Happy coding!

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Author

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πŸ‘‹ Hey, I'm Mari Selvan

For over eight years, I worked as a full-stack web developer. Now, I have chosen my profession as a full-time blogger at codetofun.com.

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Mari Selvan
Mari Selvan
11 months ago

If you have any doubts regarding this article (JavaScript Program to Check Palindrome Number), please comment here. I will help you immediately.

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