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

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---
id: 5e7b9f070b6c005b0e76f05e
title: '迭代:循环成语'
challengeType: 11
videoId: AelGAcoMXbI
bilibiliIds:
aid: 334491369
bvid: BV1tw411R7Mm
cid: 376530765
dashedName: iterations-loop-idioms
---
# --question--
## --text--
以下是一个如何在一串数值中找到最小的数值的代码。 一行代码有错误,导致整个代码无法和预期一样的运行。 那么是哪一行?
```python
smallest = None
print("Before:", smallest)
for itervar in [3, 41, 12, 9, 74, 15]:
if smallest is None or itervar < smallest:
smallest = itervar
break
print("Loop:", itervar, smallest)
print("Smallest:", smallest)
```
## --answers--
3
---
4
---
6
---
7
## --video-solution--
3