What is the output of the following Python code?list1=[80,90,100,120]print(list1[::-2]) [80,90][100,120][120, 90]Error
Question
What is the output of the following Python code?
list1 = [80, 90, 100, 120]
print(list1[::-2])
- [80, 90]
- [100, 120]
- [120, 90]
- Error
Solution
The output of the given Python code is [120, 90].
Here's the step by step explanation:
-
list1[::-2] is a slicing operation in Python. The slicing operation is performed on list1.
-
The :: operator is a slice operator that can take three arguments - start, stop, and step. If the start and stop arguments are not provided (like in this case), the operation is performed on the entire list.
-
The -2 as the step argument means that the slicing will start from the end of the list and select every second element.
-
Therefore, the slicing operation starts from the end of the list (120) and then selects every second element from the end, which is 90.
-
Hence, the output of the code is [120, 90].
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