How can I print that sums the last i element, a list with the 3rd - 5th element of this list and a list with the 4th last to 2nd last element

Question

I have a list:

lis = [1, 1, 2, 4, 5, 5, 13, 8, 34, 55, 89, 88, 102]

For this I have the following basics question?

1. How can I give an expression that sums the last i elements (1<i<5) of the list in the variable lis.

2. Hot can i give an expression that gives a list with the 3rd - 5th element of this list.

3. How can I enter an expression that gives a list with the 4th last to 2nd last element: of this list.

It may be that the list can become different Lang.

Answer 1

Try:

1. How can I give an expression that sums the last i elements (1<i<5) of the list in the variable list:

>>> sum(l[-5:])
368

2. How can I give an expression that gives a list with the 3rd - 5th element of this list.

>>> l[2:5]
[2, 4, 5]

3. How can I enter an expression that gives a list with the 4th last to 2nd last element: of this list.

>>> l[-4:-1]
[55, 89, 88]