Python 函数：统计字符串中的元音字母数量
def countVowels(string): vowels = 'aeiouAEIOU' count = 0 for char in string: if char in vowels: count += 1 return count
example usage
print(countVowels('Hello world')) # output: 3 print(countVowels('Python programming')) # output: 4
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