Commodore VIC-20 - INPUT

Appendix G BASIC Statements 351
PRINTlU ," I"
Initialize diskettes in drive 0
INPUT
The INPUT statement receives data input from the keyboard.
Format:
{
(blank) }
INPUT "message"; var[,var, ... ,var]
INPUT can be used in program mode only. When the INPUT
statement
is executed, VIC BASIC displays a question mark on the screen
requesting
data input. The user must enter data items that agree exactly in
number and type with the variables in the
INPUT statement parameter list.
If the INPUT statement has more than one variable in its parameter list,
then keyboard entries must be separated by commas. The last entry must be
terminated with a carriage return.
?1234 <CR> Single data item response
?1234,567.89,NOW<CR> Multiple data item response
If "message" is present, it is displayed before the question mark.
"message" can have as many as 80 characters.
If more than one but less than the required number of data items are
input, VIC BASIC requests additional input with double question marks
(??) until the required number of data items have been input. If too many
data items are input, the message ?EXTRA
IGNORED is displayed. The
extra input
is ignored, but the program continues execution.
Example:
Statement Operator Response
10 INPUT A,I,C' ? 123,4~S,NOW
18 INPUT A,B,Ct ? 123
?? 4~6
?? HOW
10 INPUT A,B,C' ? NOW
?~EDO FROM START
? 123
?? 456
11 78'
1111 INIIUT "A- "; PI A- 7 123
Result
A= 123,B=456,C$="NOW"
A=123
8=456
C$="NOW"
A=123
B=456
C="789"
A=123