Traverse a list in reverse order in Python

Question

So I can start from len(collection) and end in collection[0]. I also want to be able to access the loop index.

Answer 1

There are many ways to do this problem:-

The first thing you can do is use build in reverse function.

a = ["abc", “def", "ghi"]

for i in reversed(a):

 print(i)

• If you want to print answer with its actual index then you can use enumerate() and pass it to reverse function:-

a = ["abc", “def”, "ghi"] 

for i, e in reversed(list(enumerate(a))):

print(i, e)

• Another thing you can do this by slicing method:-

a = ["abc", “def”, "ghi"] 

for item in a[::-1]: 

print(item)

The [::-1] slice reverses the list in the for loop but it will never modify your list permanently.

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