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elisp: Lambda Expressions

 
 12.2 Lambda Expressions
 =======================
 
 A lambda expression is a function object written in Lisp.  Here is an
 example:
 
      (lambda (x)
        "Return the hyperbolic cosine of X."
        (* 0.5 (+ (exp x) (exp (- x)))))
 
 In Emacs Lisp, such a list is a valid expression which evaluates to a
 function object.
 
    A lambda expression, by itself, has no name; it is an “anonymous
 function”.  Although lambda expressions can be used this way (
 Anonymous Functions), they are more commonly associated with symbols
 to make “named functions” (Function Names).  Before going into
 these details, the following subsections describe the components of a
 lambda expression and what they do.
 

Menu

 
· Lambda Components           The parts of a lambda expression.
· Simple Lambda               A simple example.
· Argument List               Details and special features of argument lists.
· Function Documentation      How to put documentation in a function.
 

Info Catalog elisp: What Is a Function elisp: Functions elisp: Function Names