Keyboard Macros

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Programming with Keyboard Macros
================================

The easiest way to "program" the Emacs Calculator is to use standard
keyboard macros.  Press `C-x (' to begin recording a macro.  From
this point on, keystrokes you type will be saved away as well as
performing their usual functions.  Press `C-x )' to end recording.
Press shift-`X' (or the standard Emacs key sequence `C-x e') to
execute your keyboard macro by replaying the recorded keystrokes.
See Keyboard Macros: (emacs)Keyboard Macros, for further
information.

When you use `X' to invoke a keyboard macro, the entire macro is
treated as a single command by the undo and trail features.  The stack
display buffer is not updated during macro execution, but is instead
fixed up once the macro completes.  Thus, commands defined with
keyboard macros are convenient and efficient.  The `C-x e' command, on
the other hand, invokes the keyboard macro with no special treatment:
Each command in the macro will record its own undo information and
trail entry, and update the stack buffer accordingly.  If your macro
uses features outside of Calc's control to operate on the contents of
the Calc stack buffer, or if it includes Undo, Redo, or last-arguments
commands, you must use `C-x e' to make sure the buffer and undo list
are up-to-date at all times.  You could also consider using `K'
(`calc-keep-args') instead of `M-RET' (`calc-last-args').

Calc extends the standard Emacs keyboard macros in several ways.
Keyboard macros can be used to create user-defined commands.  Keyboard
macros can include conditional and iteration structures, somewhat
analogous to those provided by a traditional programmable calculator.
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