GNU Emacs Lisp Reference Manual

29.16.6: Indentation-Based Motion Commands

These commands, primarily for interactive use, act based on the indentation in the text.

Command: back-to-indentation

This command moves point to the first non-whitespace character in the current line (which is the line in which point is located). It returns nil.

Command: backward-to-indentation arg

This command moves point backward arg lines and then to the first nonblank character on that line. It returns nil.

Command: forward-to-indentation arg

This command moves point forward arg lines and then to the first nonblank character on that line. It returns nil.