Perl Programs and
Hello World

Here is a series of different style examples of "hello world" programs.

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#!/usr/bin/perl use struct; use warnings; # same as: perl -w print "Hello World!\n";

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perl -e 'print "Hello World!\n";'

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perl hello.pl
# where file "hello.pl" contains: print "Hello World!\n";

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On old unix systems that do not support the magic #! line, or if the path length to the perl interpreter is longer than 32 chacatacters, try this:

#!/bin/sh -- # perl, to stop looping
eval 'exec /usr/bin/perl -S ${1+"$@"}'    if 0;

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