palindrome-number

gistfile1.txt

/**
 * @param {number} x
 * @return {boolean}
 */
const isPalindrome = x => {
if (x < 0) return false
    let reverse = 0, y = x
    
    while (y > 0) {
        const lastNumber = y % 10
        reverse = (reverse * 10) + lastNumber
        y = (y / 10) | 0
    }
    return x === reverse
};