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What will be the output of the following python code snippet?

a=[0,1,2,3] for a [-1] in a: print (a[-1])

19th Nov 2024, 2:41 PM
dhavasi s
dhavasi s - avatar
3 Réponses
+ 3
Try out by yourself on Sololearn python compiler
19th Nov 2024, 2:54 PM
Alhaaz
Alhaaz - avatar
+ 1
dhavasi s , to run this code without any issue, we have to use a proper indentation in the for loop first. (the code itself does not really make any practical sense, it just looks like a code challenge.) to get some output in this code is no problem, but since it is a bit difficult to understand what the code is really doing, a debugger running in step mode would be the preferred way to get a better insight. what is this code doing: > the code is iterating with a for loop through the elements of the list `a`, getting one element at a time. > instead of using a loop variable, the value that it gets in each iteration will be assigned to the index position a[-1] of the list `a` (last element). > it prints the value from list `a` that is stored at the index position [-1]. > this is repeated until the for loop is terminated.
19th Nov 2024, 4:10 PM
Lothar
Lothar - avatar
+ 1
Lothar has it right. You are editing the list as your for loop runs. It's a pretty chaotic process as you are modifying the list as you loop. Try this variation to get a better feel for what's happening: a=[0,1,2,3] print (a[-1], a) for a[-1] in a: print (a[-1], a) This will show you all the values in 'a' with each iteration.
19th Nov 2024, 4:51 PM
Jerry Hobby
Jerry Hobby - avatar