Sams Teach Yourself Perl in 21 Days, Second Edition

Another Example: Echo

Let's do another example. Here's a script that prompts you for some input, and then echoes that input to the screen, like this:

% echo.pl
Echo? Hi Laura
Hi Laura
%

Listing 1.2 shows the contents of the echo.pl script.

Listing 1.2. The echo.pl Script

1: #!/usr/local/bin/perl -w 2: # echo the input to the output 3: 4: print 'Echo? '; 5: $input = <STDIN>; 6: print $input;

You don't have to understand all of this script right now; I'll explain all the details tomorrow on Day 2. But you should feel comfortable typing and running this script, and have a general idea of how it works. Here's a quick run-through of the code:

Lines 1 and 2 are both comments: The first for the shebang line, the second to explain what the script ...