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(elisp)Functions

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Functions
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   A Lisp program is composed mainly of Lisp functions.  This chapter
explains what functions are, how they accept arguments, and how to
define them.

What Is a Function

Lisp functions vs. primitives; terminology.

Lambda Expressions

How functions are expressed as Lisp objects.

Function Names

A symbol can serve as the name of a function.

Defining Functions

Lisp expressions for defining functions.

Calling Functions

How to use an existing function.

Mapping Functions

Applying a function to each element of a list, etc.

Anonymous Functions

Lambda expressions are functions with no names.

Function Cells

Accessing or setting the function definition

of a symbol.

Inline Functions

Defining functions that the compiler will open code.

Related Topics

Cross-references to specific Lisp primitives

that have a special bearing on how functions work.