{$try {
{$/ 4 0}
} {
{$stdout writeln $_}
} {
{$stdout writeln {}}
}}
try receives a list of statements and runs it.
If an error condition is triggered, a second list of statements is executed.
Finally, a third list of statements is executed.
If only one lists of statements has been specified, error conditions triggered by the first list of statements are silenced.