null?

tests whether the provided forms are null

Usage: (null? form+) (!null? form+) (is-null form)

If all forms evaluate to null (empty list), then this function will return #t (true). The first non-null will result in the function returning #f (false).

An Example

(null? '(1 2 3 4) '())

This example will return #f (false) because the first form is a list.

Like most predicates, this function can also be negated by prepending the ! character. This means that all the provided forms must not be null.

(!null? "hello" [99])

This example will return #t (true).