Using Nasal functions: Difference between revisions

In Nasal, functions return implicitly the values of the last expression (e.g. "nil" in empty function bodies), and you can also add an explicit "return" statement, for example to leave a function early. In addition, it is possible to return values, too. Whenever a function's signature is empty, because it doesn't take any named arguments, the parentheses are optional. The terminating semicolon after a func block is always optional:

var log_message = func {return;} # the semicolon here is also optional

var log_message = func {nil;} # and here too, of course

var log_message = func return; # look, no braces! the function ends at the semicolon

var log_message = func; # emptiness is equivalent to "nil"