I can't understand what's wrong with this code please help me

Question

https://code.sololearn.com/c6BZnO6n0th3/?ref=app

Answer 1

try [::-1] instead of [:-1]

Answer 2

P A Arrchith Iyer
Sure, no problem.

There is a thing called index slicing. In normal indexing we only use one value list[2].

But in index slicing such as list[2:4] or list[0:2:1] we use two to three values.

Index slicing arguments:
--> [start : end : step]

Default Values:
--> start = 0
--> end = length of the string
--> step = 1

When a value is not specified, it will use the default value.

For example:
🔹 list[:3] is also list[0:3]
🔹 list[:] will simply get all the elements

The third argument is the step. For example, if it's value is 2, it will get elements every two steps.
🔸 lst = [1, 2, 3, 4, 5, 6]
🔸 lst[::2]
🔹 the output would be [1, 3, 5]

But if it is negative it will get the elements from last to first (backwards)
🔸 lst = [1, 2, 3, 4, 5, 6]
🔸 lst[::-2]
🔹 the output would be [6, 4, 2]

And if the value of step is only 1 and it is negative, it will simply get the reverse of that list.
🔸 list[1, 2, 3, 4, 5]
🔸 list[::-1]
>> [5, 4, 3, 2, 1]

Answer 3

Thanks noteve it is working

Answer 4

Can you explain how it works?

Answer 5

Thank you so much noteve