Sharp PC-1403

8 6
Relational Expressions
A r e la t i on a l e x pres s io n co mpare s t w o e xp r es sio ns a nd d ete rmin es w h et h er t h e s tat ed
r e l at i o n s hip i s Tr u e o r F a l se . T he r e l at ional o p er ators a r e :
> G r eater Tha n
> = Grea t e r T h a n o r E q ual T o
E qua ls
< > N ot Equ al T o
< = L ess T ha n or Equal To
< L ess T ha n
" 15" + 10 is ille ga l
" 1 5 " + " 1 0" is "1 510 " , n ot "25 "
String Expressions
Str i ng expressions ar e s im il a r to num eric e x pr es s i ons exc ept t hat the r e i s on ly o ne
str ing o p era t or - co n caten at io n (+ ) . T h i s i s t he same symbo l as u sed f or p lu s . W h e n
use d wit h a p ai r of stri ng s , t h e + atta ches t he s e cond st r i ng t o the e nd o f t he fi r s t string
and ma kes on e lon g er s t r i n g . Y ou s ho ul d t ake ca r e i n m a k ing more com ple x st r ing
co n c aten at i o n s and othe r st ring o p er a ti o n s be cause t h e wor k s pace u se d by t h e
c ompute r fo r str i n g c al c ulati o n s i s li m ited to o nl y 79 c h arac t ers .
Note: S t r ing qu a n tit i es an d nu me ri c q uan t i ti e s c an n ot be comb in ed in t h e s ame
e x p res s io n u nl ess on e u s e s o n e o f t h e fu n ct i o n s whi c h co n v e rt a s tr i ng value
i n t o a nu m er i c va l ue or v ic e v er sa :
(A * B }"' 2
A(2 , 3) + A ( 3,4) + 5 . 0 - C
( A/ B ) * ( C+D )
A numeric expression i s co n s tr uct ed i n th e s a m e w ay th a t y o u entered compou nd
ca l cu l ator o pe r at io ns . Nume ri c e x p r e ss i on s can co n t a i n a ny m ea n ingf ul c om b i nation
of n ume ri c c on s t a n ts , num eric va r iable s, and th e se num eri c operato r s :
Numeric Operators
Th e compute r has fiv e numeric operators . The se a re t he a rithm e ti c o p er at o r s whi c h
you used when e x p l or i ng t he u se o f t he com put e r as a calc u lator i n Ch a pte r 3 :
+ Add i ti o n
- Subtr a ct i on
* Mul t iplication
I Divi s i o n
,,.... Power
Concepts and Terms of BASIC