true?

tests whether the provided forms are boolean true

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

An Example

(true? (> 3 2) (< 5 10) (and #t #f))

This example will return #f (false) because the last form evaluates to #f.

Like most predicates, this function can also be negated by prepending the ! character. This means that all the provided forms must not be true. This is equivalent to the false? predicate.

(!true? #f (> 5 10))

This example will return #t (true).