Print Count of vowels using While and For loop in Python

Using while loop:
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s='Python is a programming language'
count = 0
inc = len(s)
i = 0
while i < inc:
        if s[i] in ('aeiou'):
                count+=1
        else:
                count+=0
        i+=1
print(count)

Using for loop
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s='Python is a programming language'
count=0
for char in s:
        if char in ('aeiou'):
                count+=1
        else:
                count+=0
print(count)