Texas Instruments TI-99/4A - Page 51

Press the ENTER key now. What happened? The
computer beeped at you, wrote * INCORRECT
STATEMENT, and began a new line (with a
prompt at the left).
SCREEN 1
Next type in about twenty letters—any letters
you want—but do not put any spaces between
the letters. Press the ENTER key Your computer
now responds with a different message, BAD
NAME.
SCREEN 2
Now try typing in an instruction that your com
puter can follow. Type
CALL CLEAR
but don't press ENTERyet. (If you made a mis
take, press the ENTER key and try again.) Notice
that the computer sits there, with the flashing
cursor at the end of the line. The computer is
waiting patientlyfor you to tell it to get started.
SCREEN 3
Now, press ENTER. What happened?
Surprise! The entire screen turns blank, and
the cursor appears at the bottom of the screen.
SCREEN 4
The CALL CLEAR command is used to clear the
screen. But the computer didn't recognize the
command until you pressed the ENTER key.
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