[Link] https://leetcode.com/problems/palindrome-number/
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class Solution {
public boolean isPalindrome(int x) {
if(x < 0) return false;
String s = String.valueOf(x);
int l = s.length();
boolean isPalindrome = true;
if(l % 2 == 0) { //0 1 2 3
for(int i = 0; i <= l/2 - 1; i++) {
if(s.charAt(i) != s.charAt(l - i - 1)) return false;
}
} else {
for(int i = 0; i <= l/2 - 1; i++) { // 0 1 2 (3)
if(s.charAt(i) != s.charAt(l - i - 1)) return false;
}
}
return true;
}
}