Sharp PC-1403 - APPENDIX D EXPRESSION EVALUATION AND OPERATOR PRIORITY; Operator Priority Levels

203
W he n t h e r e are tw o or more ope r a tors at the sa m e p r iority l eve l , t h e e x p ressio n will be
eva lu a t ed fro m l eft t o righ t. (T h e expo n e nt ia tion will be eva lu ated fro m ri gh t to l eft.)
Note t h a t w i t h A + B - C , for e x am p le, the a n s wer is the sa m e w h ether the add i t i on o r
th e s ub t r act ion is done first.
W he n a n expr es s io n c o n t ains mu lti p l e n es t ed pa r en t h eses , t he i nn ermos t se t is
ev al u at ed f ir st a nd ev alu a ti on the n pr oc eed s o u twar d.
Opera ti on
P a r e n theses
V a r iab l es and Pseudova r iab l es
Fu n ctions
E x ponentiation (,... ) , ( ROT )
U nary minus, negative si g n ( - )
Mul t i p lication a nd d i v i si on (*, /)
A ddition a nd subtract i on ( + , - )
R e l atio nal oper a t o rs( < , <=, = , <>, > = , > )
L ogica l o p era t ors (A N D, OR , NO T , X O R )
Leve l
1
2
3
4
5
6
7
8
9
O p e rators on BAS I C m ode cf th e SHARP COMP UTER are ev a luated w i t h the followin g
p ri oritie s f ro m h i g h es t to l o w est:
OperatorPrtority
Since th e COMPU T ER m u s t have so me wa y to decide between th e se o ptions, i t u ses
its ru les of ope r a t or p r i ority . Because d iv i si on has a h i ghe r "p r i o r i ty" t han additio n
(see below ) , it wi ll c h oose to do the di v ision first an d the n the addition , i . e ., i t will
c hoose t he s ec o nd o pt i on and retu rn a v alue o f 65 fo r the e x p r e ss i on .
o r
5 + 45
1 00
+ 45 = 65
5
= 2
a s e ith e r a ca l c ul ati o n or as a part o f a p r ogram , th e COMPUTE R doe s not k no w
whe t her yo u meant:
100 / 5 + 4 5
W h e n t he SHARP COMPUTER is g i v e n a co mpl e x e x p r es s i o n , it ev a l uates th e pa rts
of t h e e x p re ssio n i n a se q ue n c e dete r mined b y th e p r ior it y of t he i ndividu a l pa rt s of th e
e x p r es sio n . I f yo u ent e r th e ex pr essi on :
APPENDIX D
Expres s ion E valua ti o n a nd O p er a tor P r i o r i ty