Python: string indexing
The tutor gives a Python example of string indexing.
In computer science, a string is a word which can include non-alphabetical characters. An example of a string is “desk17”.
Let’s imagine creating the variable thestring with the value “desk17”, as follows:
thestring=”desk17″
The characters in “desk17” can be referred to by number. Going forward, the letter d is in position 0. However, the string can be counted backward: 7 is in position -1. Therefore, the program
thestring=”desk17″
print(thestring[0])
print(thestring[-1])
produces the output
d
7
I’ll be talking more about Python strings in future posts:)
Source:
Donaldson, Toby. Python, 3rd Edition. Peachpit Press, 2014.
Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.
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