Else on try block

Learn how the else clause in try-except works by building a safe divisor analyzer.

exception-handling try-except-else division control-flow

Write a function `safe_divide(a, b)` that takes two numbers `a` and `b` and returns a string. The function must use a `try`/`except`/`else` construct.

- If `b` is zero, catch the `ZeroDivisionError` and return the string `"division by zero"`.
- If `b` is not zero, perform the division `a / b`. The `else` clause should be used to convert the result to a string and return it. You may round the result to 2 decimal places using `round(result, 2)` before converting to a string.
- The function must never raise an exception; it always returns a string.

The function should be implemented exactly as described. The body of your solution must include a `try` statement with an `except` and an `else` clause.

Note: The `else` clause runs only if no exception was raised in the `try` block.

Constraints

- `a` and `b` are integers or floats.
- The absolute value of `a` and `b` can be up to 10^9.
- The result of division is rounded to 2 decimal places using Python's `round`.
- Time complexity: O(1). Space complexity: O(1).

Example

>>> safe_divide(10, 2)
'5.0'
>>> safe_divide(7, 2)
'3.5'
>>> safe_divide(1, 3)
'0.33'
>>> safe_divide(10, 0)
'division by zero'

8 points ~10 min

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Hints

The `else` clause of a `try` block executes only when no exception was raised.

Use `round(result, 2)` to limit decimal places before converting to string.

The string conversion of an integer result like 5.0 will be '5.0' in Python.

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