Sharp MZ-800 User Manual

The program can no longer be listed, since the NEW command erased the program from memory.
Entering the NEW command allows you to now write a new program in memory. Enter the following
program.
10 INPUT “A=";A
20 INPUT “B=";B
30 C=A+B
40 PRINT “A+B=";C
50 END
This program will calculate the sum of the two values A and B input from the keyboard. Two new
statements are used in this program. These are the INPUT statement and the LET statement (LET
is represented by the equal ‘‘="’ symbol on line 30).
The INPUT statement on line 10 reads whatever number (don’t type characters) you type in from the
keyboard and assigns it as the value of A. The INPUT statement on line 20 reads a second number
typed in from the keyboard and assigns it as the value of B. The LET statement on line 30 calculates
the sum of values A and B and assigns the result as the value of C. At the moment in our program,
the letters A, B, and C each represent a numeric value, When letters of the alphabet are assigned values
like this, they are called ‘‘variables”’. Enter the RUN command after typing in the above program.
The screen will change as follows:
10 INPUT “A=";A
20 INPUT “B="";B
30 C=A+B
40 PRINT “A+B=";C
50 END
RUN |CR
A=
Type
in
any
number
and
press
the
[CR
|
key.
The
message
‘‘B=”"
will
be
displayed following
the
above.
A=35 cr)
B=
Type in another number and press the |CR| key. The sum of A and B will now be displayed as fol-
lows.
A=35
B=23|cR|
A+B= 58
The program shown here is very simple. If you like, you can write your own programs by combining
some of the commands and statements which are explained in Chapter 6.
You may be confused by the words ‘‘statement’’ and ‘‘command’’. Both commands and statements
control operation of the computer. The distinction between commands and statements is thatcommands
are generally entered without line numbers and are executed immediately after they are entered. State-
ments however, are included in a program and are only executed when the program is started by the
RUN command.
In practice, most commands and statements can be used both with or without line numbers, so the
distinction between them is more traditional than qualitative.
3-6

Sharp MZ-800 Specifications

General

Brand	Sharp
Model	MZ-800
Category	Desktop
Language	English