1 \textbf{Manipulating strings}

     2 

     3 String indexing starts from 0, like lists.

     4 

     5 \lstinline|s = `Hello World'|\\

     6 \lstinline|s[0:5]| gives \texttt{Hello}\\

     7 \lstinline|s[6:]| gives \textt{World}\\

     8 \lstinline|s[6::2]| gives \textt{Wrd}\\

     9 

    10 \lstinline|s.replace('e', 'a')| returns a new string with all e's

    11 replaced by a.  

    12 

    13 \lstinline|s.lower()| and \lstinline|s.upper()| return new strings

    14 with all lower and upper case letters, respectively.