[Tutor] SLICING

[Alan Gauld]

On 15/06/18 14:57, kenneth yashim wrote:
> please im new to python or any other programming language. please i want to
> understand how slicing works
> 
>     [start,stop,step]
> 
>>>> 'abc'[0:3]
> 'abc'
> 
>>>> 'abc'[0:-1]
> 'ab'
> 
> why does 'abc'[2:1]  or 'abc'[2:1] print ' ' instead of 'c'???

Because stop is lower than start and the step is implicitly +1,
so the slice doesn't include anything.

'abc'[2:]

will yield 'c' because it implicitly specifies stop as the
end of the string.

'abc'[2:1:-1]

will also yield 'c' because the -1 step value reverses the
direction.

HTH
-- 
Alan G
Author of the Learn to Program web site
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