The code reads a string and counts how many vowels it contains, but it has a few mistakes that prevent it from working correctly. - In the `is_vowel` function, you compare `c` with `"i"` using double quotes, but `"i"` is a string literal, not a single character. Use single quotes for character comparisons. - The `is_vowel` function definition ends with a semicolon after the closing brace, which is incorrect syntax. Remove that semicolon.