On Tue, Oct 23, 2012 at 7:24 PM, Nitin Ainani <nitinain...@gmail.com> wrote: > Dear Sir/Madam, > > I am new to python I have a question. It is as follows: > > Suppose s is a variable and s stores empty string > > emptyString = "" #consider the string to be non-empty, that is, let's say 13 characters long (the number you chose below) string13 = "1234567890ABC" print ( string13 [ 0 ] )
>Now if we write following statement > > print ( s [ 0 ] ) # it gives error ***what error? *** The error and your example can be used to understand indexes. s [ 0 ] is asking for the value of a specific piece of s. s[0] is asking for the value at index Zero of string s. S has nothing inside of it. > > print(s[0:]) # it does not give error #what does it give? > print (s[13:13]) # this too does not give error #What is the output > why? And with your other two examples I suggest understanding slicing. slice! I want the whole pie, myPie [ 0: ] #the : around an index has a special meaning. Try a string with text and observe the output of your questions. aString [ : ] aString [ : 0 ] aStr [ 1: ] etc Check it out, mess around, get back to me. Alexander _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
