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1.2       bowersj2    1: \label{Variables_in_Scripts}
1.1       bowersj2    2: 
                      3: Variables can be used later in the same script. For instance, we can add
                      4: another line below the \texttt{\$variable} line as such:
                      5: 
                      6: \$variable2~=~\$variable~+~2;
                      7: 
                      8: Now there is a variable called \texttt{\$variable2} with the the number {}``5''
                      9: as its value. 
                     10: 
                     11: Variables can also be used in \emph{strings}\index{strings}, which are a
                     12: sequence of letters. The underlying language of the script, Perl, has a very
                     13: large number of ways of using variables in strings, but the easiest and most
                     14: common way is to use normal double-quotes and just spell out the name of
                     15: the variable you want to use in the string, like this:
                     16: 
1.3       bowersj2   17: \$stringVar~=~{}``I~have~a~variable~with~the~value~\$variable.'';
1.1       bowersj2   18: 
                     19: This will put the string {}``I have a variable with the value 3.'' into
                     20: the variable named {}``stringVar''.