(< item1 item2 ...)

The first is less than the others.

The less-than function returns a T (true) or a nil (false):

If the item1 is less than item2 (and so on), this function returns a T.
If item2 is greater or equal to the first, this function returns nil.

If this function contains more than two items, the function returns T when each item to the right is less than the item on its left. The items can be numbers or strings.

Examples

This expression	Returns
(< 9 11)	T
(< 25 20)	nil
(< 2 6 7)	T
(< 2)	T
(< -2)	T
(< "x" "x")	nil
(< "x" "y" "z")	T

NOTE This function is the opposite of the >=(Greater Than or Equal To operator) function.

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(cond (statement1 result1 ...) ...)

(if test statement1 [statement2])

(while text statement …)

LISP Compatibility

Programming Overview of LISP (LISt Processing) Language