JavaScript - check if number is palindrome

In this short article, we would like to show how to check if a number is a palindrome using JavaScript.

Definition:

Palindromes are characters sequence that we can read the same backward as forward (e.g. 121, 12321).

The solution shown in the article allows you to check if the integer and floating-point numbers are palindromes.

Practical example:

// ONLINE-RUNNER:browser;

const isPalindrome = (number) => {
    const string = number.toString();
    for (let i = 0, j = string.length - 1; i < j; ++i, --j) {
		if (string[i] !== string[j]) {
        	return false;
        }
    }
    return true;
};


// Usage example:

console.log(isPalindrome(12321)); // true
console.log(isPalindrome(12.21)); // true
console.log(isPalindrome(454));   // true
console.log(isPalindrome(123));   // false
console.log(isPalindrome(3.14));  // false

References

1. Palindrome - Wikipedia
2. Palindrome Numbers - Wikipedia