Could you please explain me the concept of these type of Slicing Operator [::]?

Question

a=[3,2,0,11,24,6,7]
print (a[3::4])

Answer 1

It simply means that begin at index 3 then move till the end of the list in steps of 4.

Answer 2

Only to illustrate what Avinesh already mentioned:
In this sample it only prints [11]. If the list will be a=[3,2,0,11,24,6,7,8,9,10], the result will be [11,8]

Answer 3

Yeah I got that...Thanks everyone