he-002

1.000

1/1 tests· basic

Proposed solution

```python

def truncate_number(number: float) -> float:

    if number >= 0:

        integer_part = int(number)

        decimal_part = number - integer_part

        return decimal_part

    else:

        raise ValueError("The number must be positive.")

```

Test output (stdout)

.                                                                        [100%]
1 passed in 0.01s

System prompt

You are an expert programmer. Solve the task exactly as specified. Output your solution as fenced code blocks using the required file name(s) and the exact function/type signatures requested. Prefer correctness; do not include prose outside code unless asked.