Easy solution
IntuitionApproachComplexity
Time complexity:

Space complexity:
Code
# Intuition
<!-- Describe your first thoughts on how to solve this problem. -->

# Approach
<!-- Describe your approach to solving the problem. -->

# Complexity
- Time complexity:
<!-- Add your time complexity here, e.g. $$O(n)$$ -->

- Space complexity:
<!-- Add your space complexity here, e.g. $$O(n)$$ -->

# Code
```python3 []
class Solution:
    def convertToBase7(self, num: int) -> str:
        if num == 0:
            return '0'
        
        is_negative = num < 0
        num = abs(num)
        result = ""
        
        while num > 0:
            digit = num % 7
            result = str(digit) + result
            num //= 7
        
        if is_negative:
            result = "-" + result
        
        return result

```
['Python3']