We Pause; Summary - Sharp PC-1500 Instruction Manual

All and more about Sharp PC-1500 at http://www.PC-1500.info
Notice that the space between Y and J was stored and that the " (double quote) characters
were not. The double quotes serve as "delimiters." a guide to indicate what other characters
will be stored. Any character (includ ing spaces). except the double quote itself, may be stored.
This sequence of characters
enclo~ed
by double quotes
is called a
character "strin.g"
and
character
variables are often referred to as "string variables." Each character variable can hold up to 16
characters. Some caution must be used in order not to exceed this limit or information will
be lost. This is demonstrated by the following assignment which unintentionally normalizes
John's eating habits. Type:
F$
=
"JOHN EATS BUTTERFLIES"
Now recall the information:
m m
I
ENTER
I.
Some change!
One
final
point to remember about variables: they have the memory of an elephant. lnforma·
tion remains stored in a variable until:
1) Another Assignment statement is executed for the same variable.
2) A NEW or CLEAR command is given.
3) A program is run using the RUN command.
4) The computer's batteries are changed.
The value of a variable is even retainc<.l when the power is turned off I Test this by turning SHARP
off, then on. In RUN mode, ask for the value of G {Type QD l< • T<• I ). Impressive, eh? As
you begin to program in the next chapter, you will find variabl•s am indispensable.
J .
We Pause ... (without station identification)
Congratulations! If you have perservered to this point, you now know the fundamentals of
the SHARP PC. 1500 well enough to perform a wide variety of calculations. Because the PC-1500
is so vers.atile, each reader will find many uses for it in h is own fields of interest. No matter' what
your application is. however, you will eventually want to learn programming ; n order to fully
exploit the power of this amazing machine.
At this point you have a choice. For those whose hearts have quickened, whose breathing is
more rapid at the thought of programming (and for anyone not yet asleep). we request that
you to go back and read Chapter O, integrating your new knowledge with the information there.
Then proceed to Chapter 3.
Other readers, who have an immediate need to use such features as scientific notation and
trigonometric functions, may proceed directly to the chapter on Advanced Calculations.
SUMMARY
1) Modes - The SHARP PC· 1500 operates in one of three diflerent modes: RUIN, PROgram, and
RESERVE. Each change in mode causes a slightly different change in internal function,
analogous to shifting gears in a car. The RUN mode is for calculations and is the mode in which
you must "run" (execute) programs. In the PROgram mode, all writing and ed iting (additions
and corrections) of programs is performed.
2) Calculations - SHARP performs common arithmetic calculations in the RUN mode. The CL
(clearl key should be pressed before each calculation to clear the results of a previous calcula·
tion. NOT pressing the Clear key between c.alculations allows a series of calculations utilizing
the result of the immediately precceding calculation.
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