22 lines
338 B
Markdown
22 lines
338 B
Markdown
### count_vowels
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Retuns `number` of vowels in provided `string`.
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Use a regular expression to count the number of vowels `(A, E, I, O, U)` in a string.
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```python
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import re
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def count_vowels(str):
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return len(len(re.findall(r'[aeiou]', str, re.IGNORECASE)))
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```
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``` python
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count_vowels('foobar') # 3
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count_vowels('gym') # 0
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```
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