Core Python Programming

2.7. Strings

Strings in Python are identified as a contiguous set of characters in between quotation marks. Python allows for either pairs of single or double quotes. Subsets of strings can be taken using the slice operator ( [ ] and [ : ] ) with indexes starting at 0 in the beginning of the string and working their way from -1 at the end. The plus ( + ) sign is the string concatenation operator, and the asterisk ( * ) is the repetition operator. Here are some examples of strings and string usage:

 >>> pystr = 'Python' >>> iscool = 'is cool!' >>> pystr[0] 'P' >>> pystr[2:5] 'tho' >>> iscool[:2] 'is' >>> iscool[3:] 'cool!' >>> iscool[-1] '!' >>> pystr + iscool 'Pythonis cool!' >>> pystr + ' ' + iscool 'Python is cool!' >>> pystr * 2 'PythonPython' ...