why List Slices gives me empty output

Question

squares = [0,1,2,3,4,5,6,7,8,9,10]
print(squares[7:5])

output is []

squares = [0,1,2,3,4,5,6,7,8,9,10]
print(squares[3:6:-1])

output is []

Answer 1

Because there is no output.
7:5 try's to return everything from index 7 to index 5, but it reads from left to right, so 5 is before 7 and your code fails. Try: squares[7:5:-1]