Detecting the last Iteration in a loop

Question

I have a word and I want to split each character from a word. I use FOR IN loop to split the characters. During split I want to detect first and last characters. I use a variable count and count is initialized to 0. If count=1 then it is first character. But similarly how can I detect the last character in FOR IN loop in python

    count=0;
    for w in word:
        count++
        if count==1:
            #first character

cs95 · Accepted Answer · 2018-11-19T22:20:11.667

7

Why not just use enumerate? It's meant for this very purpose.

for i, w in enumerate(word):
    if i in {0, len(word)-1}:
        ... # do something

You can get rid of the count variable now.

edited Nov 19 '18 at 22:20

answered Aug 29 '17 at 06:23

cs95

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Why not use `if i == len(word)-1` ? – Florent Apr 12 '19 at 18:42
@Florent They want to detect both the first and last character. – cs95 Apr 12 '19 at 19:15

score 1 · Answer 2 · answered Aug 29 '17 at 06:22

1

if count == len(word):
   #last

answered Aug 29 '17 at 06:22

GuangshengZuo

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score 1 · Answer 3 · answered Aug 29 '17 at 06:30

1

If you just want to get the first and last characters, you can use the first and last index.

s = 'word'
s[0] >>> 'w'
s[-1] >>> 'd'

answered Aug 29 '17 at 06:30

jabargas

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Not a good idea. You'd break early if that last char exists elsewhere. – cs95 Aug 29 '17 at 06:42

Detecting the last Iteration in a loop

3 Answers3