Understanding slice notation

Question

I think the slice notation are sort of powerful but I don't know much about it, So can anyone give me a good explanation on Python's slice notation?

Answer 1

It's a very simple thing and well explained from ASCII art diagram for how slices work

 +---+---+---+---+---+---+
 | P | y | t | h | o | n |
 +---+---+---+---+---+---+
 0   1   2   3   4   5   6
-6  -5  -4  -3  -2  -1

think the indices as pointing between characters, see the left edge above as it's pointing at first character numbered 0. Then at the right edge of last character of a string of n characters has index n.

You can look into the Python help section for reference .

Happy Learning, Cheers..!!

Answer 2

It is very simple:

a[start:stop]  

a[start:]      

a[:stop]      

a[:]

You can use the following video tutorials to clear all your doubts:-

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