leetcode-patterns-java/LeetCode_Problems/Java/medium/0007. Reverse Integer.java at main · elchibek5/leetcode-patterns-java · GitHub

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class Solution {
    public int reverse(int x) {
        long ans = 0;

        while (x != 0) {
            int lastDigit = x % 10;
            ans = (ans * 10) + lastDigit;

            if (ans > Integer.MAX_VALUE || ans < Integer.MIN_VALUE) {
                return 0;
            }

            x /= 10;
        }

        return (int) ans;
    }
}