(= item1 item2 ...)

Return T if they're the same.

This function tells you whether two (or more) items are equal:

• If they are equal, the result is a T (true).
• If not, this function returns nil (false).

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

Examples

NOTES

• Don't confuse the = function with the equal function. Here's the difference: The = function compares numbers and strings; the equal function compares lists.
• Both = and equal perform comparisons; neither performs the "equals" function you might expect from arithmetic, such as 1 + 2 = 3. In LISP, that service is provided by the setq function.

Tell me about...

(/= item1 item2 ...)

(< item1 item2 ...)

(<= item1 item2 ...)

(> item1 item2 ...)

(>= item1 item2 ...)

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

(eq statement1 statement2)

(if test statement1 [statement2])

(while text statement )

LISP Compatibility

Programming Overview of LISP (LISt Processing) Language