Palindrome Number | LeetCode 9

[Full explanation will be added soon.]

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Here is the full implementation.

/**
 * @param {number} x
 * @return {boolean}
 */
let isPalindrome = function(x) {
    if (x < 0) {
        return false;
    }
    
    return x === reversedInteger(x);
};

let reversedInteger = function(x) {
    let reversed = 0;
    
    while (x > 0) {
        reversed = (reversed * 10) + (x % 10);
        x = Math.floor(x / 10);
    }
    
    return reversed;
};