Added lisp along with some study work

lisp/land-of-lisp/ch2/notes.txt

@@ -0,0 +1,30 @@
+;; List of variables that are surrounded by parens
+
+(let ((a 5)
+			(b 6))
+	(+ a b))
+
+;; Local functions
+;; It's like let. A list of functions and their descriptions,
+;; followed by some stuff to do with them
+(flet ((function_name (args)
+					...Function Body...))
+	body)
+;;example
+(flet ((f (n)
+					(+ n 10)))
+	(f 5))
+
+>> 15
+
+;; labels -- like flet, but allow functions to call other 
+;; defined functions or themselves
+;; Same basic structure as flet
+
+(labels ((a (n)
+						(+ n 5))
+					(b (n)
+						(+ (a n) 6)))
+	(b 10))
+>> 21
+