$ perl -le'print $ARGV[0]' 'Hello, World!'
Hello, World!

##</code><code>##

$ FOO='Hello, World!'

$ perl -le'print $ARGV[0]' "$FOO"
Hello, World!

##</code><code>##

$ FOO='Hello, World!'

$ export FOO

$ perl -le'print $ENV{FOO}'
Hello, World!

##</code><code>##

$ export FOO='Hello, World!'

$ perl -le'print $ENV{FOO}'
Hello, World!

##</code><code>##

$ FOO='Hello, World!' perl -le'print $ENV{FOO}'
Hello, World!