CODEWITHSUNDEEP
python-3.xfor-loopwhile-loop
Andres sierra
Andres sierra

Reputation: 13

Iterate a string using a for loop and accesing indexes in python 3

I'm trying to iterate a string to do an if statement to check if its uppercase or not for example:

s="abcd"
for x in s:
    if s[x].isupper():
        print(s[x])

However this doesn't work. But if I use a while loop, it works:

i=0
while i < len(s):
    if s[i].isupper():
        print(s[i])

I just want to know if the same while loop can be made with a for loop

Upvotes: 1

Views: 41

Answers (1)

willeM_ Van Onsem
willeM_ Van Onsem

Reputation: 477190

That's because a for loop iterates over the characters. So x in your for loop is a character, not an index:

s="abcd"
for x in s:
    if x.isupper():
        print(x)

Should work. Python sees strings as an ordered collection of characters. A for loop over a collection usually iterates over its elements (the keys in case of a dictionary).

Upvotes: 2

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