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1.2.3. Entering Commands
While reading the tutorial it is highly recommended that you have
a copy of CoCoA running in a separate window in order to play with the
examples presented.  

If you are using the CoCoA GUI (Graphical User Interface) then you 
should follow the dedicated section "User Interface Guide".

To execute a CoCoA command, type it into the window, ending it with a
semicolon, then press the 'return' key or 'enter' key (depending on
your system).  A command can run over several lines; CoCoA will wait
for a semicolon before processing the command.  Also, several commands
may be written on a single line (each ending with a semicolon).

See the next section for examples.

IMPORTANT NOTES for Macintosh OS 9:

1.  Only the 'enter' key (on the far right of the keyboard is the one
to use) will function to enter CoCoA commands.  Experiment.

2. To enter multiple lines, one needs to highlight the lines using the
mouse before hitting the 'enter' key.  Otherwise, the enter key just
feeds the line containing the cursor to CoCoA.