Count the vowels

Count how many characters of a string are vowels — a, e, i, o, u — treating capitals and lowercase the same.

Lowercase the string first with s.lower() so you only have five letters to check. The expression ch in "aeiou" is True when ch is one of them.

Write count_vowels(s): return how many letters in s are vowels (a, e, i, o, u), case-insensitive.

def count_vowels(s):
    # count the vowels in s (a, e, i, o, u)
    return 0

Click Run to see the output here.

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Count the vowels

Count the vowels

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