Shell$ perl -we 'my $word = q(yey);print qq($sword\n);'

prints to tty:
Name "main::sword" used only once: possible typo at -e line 1.
Use of uninitialized value $sword in Concatenation (.) or String at -e line 1. 

Shell$ _

##</code><code>##

Shell$ perl -ce 'my $word = q(yey)); print qq($word\n);'

prints to tty:
syntax error at -e line 1, near "q(yey))"
-e had compilation errors
$Shell _