20,741
edits
Using Nasal functions: Difference between revisions
Jump to navigation
Jump to search
m
→Returning from functions
No edit summary |
|||
| Line 83: | Line 83: | ||
== Returning from functions == | == Returning from functions == | ||
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: | In Nasal, functions return implicitly the values of the last expression (e.g. "nil" in empty function bodies, or when using a single return; expression), 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: | ||
So, semantically, these are all equivalent: | So, semantically, these are all equivalent: | ||
| Line 91: | Line 91: | ||
var log_message = func() {} | var log_message = func() {} | ||
var log_message = func; | |||
var log_message = func {return;} # the semicolon here is also optional | var log_message = func {return;} # the semicolon here is also optional | ||
var log_message = func return; | |||
var log_message = func {nil;} # and here too, of course | var log_message = func {nil;} # and here too, of course | ||