---
id: practical-python-1.12
source_exercise_id: "1.12"
title: "A Mystery"
section: "1.3 Numbers"
source_path: "01_Introduction/03_Numbers.md"
source_repo: "https://github.com/dabeaz-course/practical-python"
source_commit: "93dca856b41c61a0a0f85ae334116e4c125629ea"
student_visible_solution: false
has_private_solution: false
skip: false
---

# Exercise 1.12: A Mystery

> Source: Practical Python Programming, `01_Introduction/03_Numbers.md`.

### Exercise 1.12: A Mystery

`int()` and `float()` can be used to convert numbers.  For example,

```python
>>> int("123")
123
>>> float("1.23")
1.23
>>>
```

With that in mind, can you explain this behavior?

```python
>>> bool("False")
True
>>>
```

[Contents](../Contents.md) \| [Previous (1.2 A First Program)](02_Hello_world.md) \| [Next (1.4 Strings)](04_Strings.md)

## 关联来源

- [[summaries/03_Numbers]]