vowels.py

# this is a comment
s = 'Quick brown fox jumps over lazy white dog'

scount = 0

for c in s :
   if c == 'a' or c == 'o' or c == 'u' or c == 'i' or c == 'e':
    # "count" in the following line is being used for the first time. It is one level deep i.e. inside the loop. So its value will not be available outside the loop.
    # count += 1

    # so use scount to access the value outside the loop as well. because scount was already declared outside the loop
    scount += 1 

print("Number of vowells: " + str(scount))