Commodore Plus 4 - Page 55

BASIC Version 3.5 Commands, Functions, and System Variables 43
GETKEY abbr. gEkE
GETKEY input list
Like INPUT, GETKEY accepts input from the keyboard during program
execution. GETKEY, however, accepts only a single key at a time as data entry.
Unlike GET, GETKEY waits for input.
Parameter: variable(s)
The variable is nearly always a string variable. It stands for the key to be typed
in response to the GETKEY command. Use of a numeric variable allows only the
0 through 9 keys to be entered. Any other key causes a type mismatch error, which
aborts the program unless TRAPped.
Example: 10 ? "PRESS THE CURSOR KEY TO ANSWER"
SO ? "MY GROUP IS: <- RED OR BLUE ->"
30 GETKEY A$
40 IF A$ = CHR$(157) THEN ? "RED GROUP,
DO ODD-NUMBERED EXERCISES"
50 IF A$ = CHR$(29) THEN ? "BLUE GROUP,
DO EVEN-NUMBERED EXERCISES"
GET#
GET# file number, input list
Waits for you to
press a key; the key's
value is assigned
to A$.
Checks key entered.
CHR$(157) is cursor-
left key code.
Check key entered.
CHR$(29) is cursor-
right key code.
Abbr. gE#
Retrieves data one character at a time from an OPENed device or file. GET#
works like a GET command except that the GET command gets a character from
the keyboard, while the GET# command gets a character from a device or a file.
GET# works like INPUT# except that INPUT# gets a whole group of characters
from the file, while GET# gets only one character at a time.
Parameters: file number, variable(s)
1. The file number is a logical file number that links the file or device to other
commands, including the OPEN command that accesses the device or file before
it can be used.
2. The variable is nearly always a string variable. Use of numeric variables
allows only values from ASC("0") (48) to ASC("9") (57) to be read. Anything else
causes a type mismatch error, which aborts the program unless TRAPped.