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ID: 3696835 • Letter: H
Question
home / study / engineering / computer science / questions and answers / in python, write a recursive function, containsvowel, ... Question In Python, Write a recursive function, containsVowel, which accepts one parameter containing a string value and returns True if the string contains a vowel. A string contains a vowel if: The first character of the string is a vowel or The rest of the string (beyond the first character) contains a vowel
My code:
def containsVowel(s): if s[0:] == "aeiouAEIOU":
return True
else:
return False
it doesnt work however. It actually does the opposite of what i want it to do. Also it doesnt work for all variables.
Explanation / Answer
def containsVowel(str):
if(len(str) ==1):
if(str[0]=='a' or str[0]=='A' or str[0]=='e' or str[0]=='E' or str[0]=='i'
or str[0]=='I' or str[0]=='o' or str[0]=='O' or str[0]=='u' or str[0]=='U'):
return True
else:
return False
else: # for recursive algo get the first element result and repeat it for remaining items
return (str[0]=='a' or str[0]=='A' or str[0]=='e' or str[0]=='E' or str[0]=='i'
or str[0]=='I' or str[0]=='o' or str[0]=='O' or str[0]=='u' or str[0]=='U') and containsVowel(str[1:])
print containsVowel("aeiou")
print containsVowel("aeion")
print containsVowel("aenou")
print containsVowel("I")
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