freeCodeCamp/curriculum/challenges/chinese/07-scientific-computing-with-python/python-for-everybody/loops-and-iterations.md

---
id: 5e7b9f060b6c005b0e76f05c
challengeType: 11
videoId: dLA-szNRnUY
---

## Description
<section id='description'>

</section>

## Tests
<section id='tests'>

```yml
question:
  text: |
    What will the following code print out?:
    ```python
    n = 0
    while True:
        if n == 3:
            break
        print(n)
        n = n + 1
    ```
  answers:
    - |
        0

        1

        2
    - |
        0

        1

        2

        3
    - |
        1

        2
    - |
        1

        2

        3
  solution: 1
```

</section>