Question

Assuming A = [1, 2, 3,5,7,8,9] what is
the output of
:>>> A[3:0:-1]​

Answer 1

Answer:

The output will be:

_______________

5

3

2

_______________

Explanation:

Mark the indices of the elements as,

A[0]=1,

A[1]=2,

A[2]=3,

A[3]=5,

A[4]=7,

A[5]=8,

A[6]=9,

Now, the slicing method you used had -1 as skipping number, which means the list will be read backwards.

The initial number is 3, which means it will be read from 3.

And the final number is 0 which mean the list will be read till one element before 0 which is 1 here.

Summarizing it , the numbers you should except should begin at 3rd index, moving backwards just before index 0 and so the mentioned output would be printed as a result.

Here's one verification code (image).