Commodore Plus 4 - Page 81

Statement name: GETKEY
Format GETKEY variable to be input
GETKEY is another way for you to enter data while the program
is being RUN. The GETKEY statement accepts only one key at a
time. Whatever key is pressed is assigned to the string variable
you specified in the GET statement (AS, for example). GETKEY is
useful because it allows you to enter data one character at a time
without having to press the RETURN key after each character.
The GETKEY statement may only be used in a program.
Example of GETKEY in a program:
1000 PRINT "PLEASE CHOOSE A, B, C, D, E, OR F"
1010 GETKEY A$
Statement Name READ'DATA
Format: READ variables to be input
DATA data items to be read
The READ/DATA statements are used as a convenient way to assign
values to variables. You can think of the READ statement as an INPUT
statement that asks the Plus/4 for the data, rather than the user The
data is (naturally enough) kept in DATA statements. When the Plus/4
executes a READ statement, it looks at the next data item in the DATA
statement, and assigns it to the variable in the READ statement.
The READ statement is always used with a DATA statement. A DATA
statement is just a line of data (words or numbers) in a program. The
— READ statement is used to assign those values to variables (For each
variable listed in the READ statement, your Plus/4 "reads" a value from
the DATA line for that variable.) A DATA statement is not executable
and can appear anywhere in the program. The thing to remember
about the READ statement is that the variable type must be the same
as the type of data available in the DATA statement (number variables
for numbers, text variables for text). Otherwise, a TYPE MISMATCH
_ ERROR occurs.
Example.
10READA$.B$,C$,D$,E$
__ 20 PRINT A$:PRINT B$:PRINT C$
30 PRINT D$: PRINT E$