GNU Emacs Manual. Node: Program Indent

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20.5: 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 properly either a single line, a specified number of lines, or all of the lines inside a single parenthetical grouping.

  • 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 library pp. This program reformats a Lisp object with indentation chosen to look nice.

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