# Copyright (C) 2007-2009, Parrot Foundation. =head1 Subroutines PIR is a subroutine-based or "procedural" programming language. Subroutines are used to break large tasks into smaller chunks. These chunks can be used and reused throughout the program. Subroutines are defined with the C<.sub> directive and continue until the C<.end> directive. Subroutines can take any number of input parameters, and can return any number of output parameters. In practice, we recommend you don't go overboard with creating huge argument lists because it gets very messy and difficult to deal with very quickly. =cut .sub main :main $S0 = foo("Zaphod") say $S0 .end .sub foo .param string name .local string greeting greeting = "Hello, " . name .return (greeting) .end # Local Variables: # mode: pir # fill-column: 100 # End: # vim: expandtab shiftwidth=4 ft=pir: