I don't understand slicing with negative bounds in Python. How is this supposed to work?

Question

I am a newbie to Python and have come across the following example in my book that is not explained very well. Here is my print out from the interpreter:

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Answer 1

If we want to print from the back-end of the string we can go for negative indexing. Indexing starts from -1.

Example : s = 'hello world'

s[-11:-1] = 'hello worl' s[-1:-11] = '' // beginning value should be lower(i.e., in this case -1 greater than -11) if it is greater it won't print anything.