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for loop the difference - 3Pinter - Jan-10-2019
Hey guys,
I was reading python learn-stuff at https://www.programiz.com/python-programming/for-loop
and I was wondering: is the suggested code logical?
# Program to iterate through a list using indexing
genre = ['pop', 'rock', 'jazz']
# iterate over the list using index
for i in range(len(genre)):
print("I like", genre[i])If I had to code it: I would (a newbie at python!):# Program to iterate through a list using indexing
genre = ['pop', 'rock', 'jazz']
# iterate over the list using index
for i in genre:
print("I like", i)I don't understand why range+len is needed. Perhaps someone can clearify?
RE: for loop the difference - buran - Jan-10-2019
Your code is definitely better, with the recommendation to use more descriptive names like
genres = ... and for genre in genres: instead of i. We even have special thread in Tutorials - Never use "for i in range(len(sequence)):"I looked at the article in your link - note that it's just an example, i.e. they show the more pythonic way first and they also show what you can do too using index. In other words I would say it's just for educational purposes
RE: for loop the difference - 3Pinter - Jan-10-2019
Ok, thanks for clearifying Buran,
Sometimes I have to check if I understand it all correctly. And since there are often more than one ways of achieving things (and sometimes with surprisingly faster timed versions), I'm curious which is better and/or why things are done this way.
Thanks for your suggestion regarding "genre" vs. "i". Noted!
3Pinter