Functions Documentation
View Function Edit Function
Name isfunction
Syntax (isfunction expr) -> True/Nil
Argument List expr: The expression you want to test for being a function (lambda or builtin).
Returns boolean: True if the expression is a function (lambda or builtin). Nil otherwise.
Category condition query, function operator
Description Checks if something is a function or not and returns True if it is.
Example 
(isfunction "Betel")
Returns Nil 
(isfunction isfunction)

Returns True
Comment Useful in error checking.