The Listener and text files

The Listener is useful for immediate interactions with Lisp. However, it is not recomended for writing source code which you intend to keep. While it is possible to save the text of the Listener, this text includes not only your code, but also values returned by MCL, as well as additional printed information such as error messages and prompts.

You edit source code which you wish to keep in Fred windows. Fred is the MCL editor, described below. Fred stores source code as Macintosh text files with additional font information. Most source code is written in Fred windows, or written in the Listener and then copied into a Fred window for further editing into a source code file.

When you want to use the source code, you simply open the source file and edit or execute the code, as described in the following sections.

Gettmg Started with MCL - 19 OCT 1996

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