7. Reverse Integer
https://leetcode.com/problems/reverse-integer/description/
Core Idea
Step 1: Handle Sign
Store sign separately.
Work with abs(x).
Step 2: Reverse Digits
Use:
rem = num % 10
rev = rev * 10 + rem
num = num // 10
Step 3: Restore Sign
Instead of:
re...
reverse-integer.hashnode.dev1 min read