Commodore Plus 4 - Page 79

not allowed in the controf room. The easiest way would be to PRINT
your statement as a text string. Text strings are printed out exactly as
you type them in. They must be surrounded by double quotes ("").
For example
100 PRINT "YOU ARE BROKE!"
would tell the user that there is no money left, while
150 PRINT "YOU CAN'T BRING YOUR FRIEND INTO THE
CONTROLROOM"
could be used in the second example.
Whatever appears between the quotation marks is known as a literal,
because it is PRINTed exactly as it appears. It doesn't matter whether it
is words, letters, numbers, punctuation marks, etc.
Certain keys, like the cursor and color keys, act differently when used
in text strings. Instead of changing the color or moving the cursor when
you type the key, a reverse character is printed in the string. When
the program is RUN. the character is translated into what you wanted
typed in the first place. This lets you clear the screen, change the color
your are PRINTing in, move the cursor, all within your program. For
example, try this:
10 PRINT" SHIFT CLR'HOME CONTROL 3 TESTING.
CRSR-DOWN CONTROL 7 TESTING''
t>i^i\
Remember to type the following keys simultaneously when you use
the SHIFT and CONTROL keys. The reversed symbols are the signals
to [he computer that tells it to perform the dear screen, color change
— or move the cursor.
Use #2 Printing Numbers and Calculations
PRINT can display the answer to a calculation made within the print
statement. (SEE NUMBERS and CALCULATIONS). The Plus/4 per
forms the operations needed to gel the answer, then displays it on
the screen For example.
100 PRINT 58*15,23,45-1-100O-45*(4-3)
— prints
870 23 1000
72