26.3 Indentation for Programs

The best way to keep a program properly indented is to use Emacs to reindent it as you change it. Emacs has commands to indent either a single line, a specified number of lines, or all of the lines inside a single parenthetical grouping.

See Indentation, for general information about indentation. This section describes indentation features specific to programming language modes.

• Basic Indent		Indenting a single line.
• Multi-line Indent		Commands to reindent many lines at once.
• Lisp Indent		Specifying how each Lisp function should be indented.
• C Indent		Extra features for indenting C and related modes.
• Custom C Indent		Controlling indentation style for C and related modes.

Emacs also provides a Lisp pretty-printer in the pp package, which reformats Lisp objects with nice-looking indentation. See pp in The Emacs Lisp Reference Manual.