> You can also rely on the fact that logical expressions are always short-circuited, so False && Print["won't be printed"], doesn't print anything. This is tru

> You can also rely on the fact that logical expressions are always short-circuited, so False && Print["won't be printed"], doesn't print anything. This is true for any language I can think of. E.g. in perl open(my $fh, "<", "input.txt") or die "cannot open < input.txt: $!"; is idiomatic