Why avoid while loops?

Question

I\'m about 2 weeks deep in my study of Python as an introductory language. I\'ve hit a point in Zed\'s \"Learn Python the Hard Way\" where he suggests:

Answer 1

The general issue with while loops is that it is easy to overlook, or somehow skip the statement where the loop variable gets incremented. Even a C for-loop can have this problem - you can write for(int x=0; x<10;), although it is unlikely. But a Python for loop has no such problem, since it takes care of advancing the iterator for you. On the other hand, a while loop forces you to implement a never fail increment.

s = "ABCDEF"
i = 0
while (i < len(s)):
    if s[i] in "AEIOU":
        print s[i], 'is a vowel'
        i += 1

is an infinite loop as soon as you hit the first non-vowel.