Palindrome Number
Difficulty: EasyTopic: MathLeetcode:9.Palindrome NumberGiven an integer x, return true if x is a palindrome__, and false otherwise.
Example 1:
Input: x = 121
Output: true
Explanation: 121 reads as 121 from left to right and from right to left.
Example 2:
Input: x = -121
Output: false
Explanation: From left to right, it reads -121. From right to left, it becomes 121-. Therefore it is not a palindrome.
Example 3:
Input: x = 10
Output: false
Explanation: Reads 01 from right to left. Therefore it is not a palindrome.
Constraints:
-231 <= x <= 231 - 1
Follow up: Could you solve it without converting the integer to a string?
Solution
write solution in here
/**
* @param {number} x
* @return {boolean}
*/
var isPalindrome = function (x) {
const s = String(x)
let l = 0, r = s.length - 1
while (l <= r) {
if (s[l] !== s[r]) {
return false
}
l++
r--
}
return true
};