Except as otherwise noted, all arguments may be expressions. Also, the ACL parser recognizes function calls in the context of a command. This means that, in addition to using a variable assignment or logical expression to call a function (such as $n = split("a b c", $arr, " "), you can type a command that contains a function call at the command line. Here is an example:

When you call a function in this manner, the value returned by the function is discarded.