> For the complete documentation index, see [llms.txt](https://garylai.gitbook.io/algorithm-and-data-structure/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://garylai.gitbook.io/algorithm-and-data-structure/problems/bit-manipulation/reverse-integer.md).

# 7. Reverse Integer

[7. Reverse Integer](https://leetcode.com/problems/reverse-integer/)

```python
class Solution:
    def reverse(self, x: int) -> int:  
        res = 0
        sign = x > 0
        x = abs(x)
        while x > 0:
            res = res * 10 + x % 10
            x //= 10
        res = res if sign else -res
        return res if res.bit_length() < 32 else 0
```