Line 10 tells the computer to save enough space
in
its memory for
an
answer that is a maximum of 100 characters. The variable
in
this
program has been named ANSWER. The variable
is
going to store
letters and numbers, so it
is
a string variable. String variables are
designated
by
a dollar sign after the last letter of the variable name.
Line
130 allows you to enter
an
answer. When you
run
the program,
the computer displays the question
on
the screen, and you then type
in
your answer. That answer
is
stored
in
the string variable called
ANSWER$.
If the DIM statement, line
10
, was omitted,
an
Error
message would occur, and the
INPUT statement wouldn't work.
?:
Courtesy of INPUT
Run
the program again. Two question marks will appear
on
the
screen. The second question mark will
be
on
the line next to the left
margin. List your program and notice that you typed only one question
mark
in
the program. The INPUT command always puts a question
mark
on
the screen for you. Type the variation of line 120 below:
Run
the program and type
in
your response when the computer asks
its question. Now only one question mark appears, and your answer
immediately follows the question
on
the same line. Create some more
dialogue by dimensioning more string variables and inserting more
I
N-
PUT
statements. The DIM statements should
be
at the beginning of
the program:
20
DIM
DATE$
(25)
1.40
PRINT:
PRINT
"WHEN WOULD YOU
LIKE
TO
COME AND
PICK
UP
YOUR
PRIZE";
1.50
INPUT
DATE$
RUN
String Variables
in
PRINT Statements
The computer program now asks two questions but doesn't respond to
your last answer.
To
get a response, you can place the string variable
in the
PRINT statement
in
the following way:
1.60
PRINT"
I'
M
SORRV
..
BUT
OUR
OFFICES
ARE ALWAVS
CLOSED
ON
";DATE$;".
TOO
BAD!"
The semicolon glues the string variable between two phrases in
quotation marks.
Run
the program. If the words are not spaced
correctly, compare your line to the line abov
e.
You probably left out a
44
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