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--- ch2_1_lambda [2022/02/23 06:45] – admin
+++ ch2_1_lambda [2022/03/31 05:07] (current) – admin
@@ Line 4: / Line 4: @@
 <code lisp>
->((lambda (a b) (+ a b)) 3 5)   ; unnamed function for adding 2 numbers
+>(lambda (a b) (+ a b))   ; lambda call
+#<user-defined lambda>    ; function object was returned
+</code>
+The ''LAMBDA'' form can be used in place of the operator.
+<code lisp>
+>((lambda (a b) (+ a b)) 3 5)   ; defined the lambda and immediately used on 3 5
 </code>
@@ Line 25: / Line 32: @@
 </code>
-The functions created by ''LAMBDA'' have lexical closure just like named functions.
+Parameter list of ''LAMBDA'' can have ''&OPTIONAL'' and ''&REST'' parameters just like the named functions (see ''DEFUN'').
+The functions created by ''LAMBDA'' have lexical closure also like the named functions.