Sharp PC-1403 - Page 96

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Y o u m u s t u se pa r e nt h e se s for fu nc ti on s w h i c h h ave mo r e t han on e a r g um en t.
U s in g pa r ent h e s es a lw a y s ma kes pro gra m s c l ea r e r .
S ee C hapt e r 8 f o r a complete li s t of f unc t io ns ava i la b l e on t he c omput e r.
ABS ( -5 ) is 5
ABS (6 ) is 6
L OG i s a f u nc t io n which comp utes t h e log to t h e base 1 0 o f i t s ar g ume n t.
L O G (100) i s 2
L O G ( 1000) is 3
A fun c tio n c an be us ed an y p la c e t h at a va r i ab l e c a n b e u sed . M an y fun c tion s do n ot
r equir e th e u s e of p a r e nt he s e s:
L O G 1 00 i s the sam e as LOG (100)
Funct i ons a r e s pe c ial comp onents of the BA SIC l ang u age which take o n e value a nd
tr a n s form i t into another value . Fu n ct i o n s act like v ariab l e s whose va l ue i s determ i ned
by t he va l ue o f oth er v ar i ab l e s or e x pr e ssi ons . ABS i s a f u n c t i o n wh ic h produ c es t h e
ab so lute va l u e of it s a r gum ent:
Functions
T he 1 mea ns t hat th e e x press i on i s T rue.
1 .
(5> 3) AN D ( 2 <6)
D is pl a y
I n put
In genera l , any of t h e ab ove expres s i o n s c an be u se d i n th e R UN m ode well as i n
p rogr a m min g a BAS I C stat e ment. I n th e RUN mod e a n e x p r ess i on i s co mput ed and
d isp l a y ed i mme d i ate ly . F or e xa mple :
RUN Mode
5 + ( 2 * 3 )
o r
( 5 + 2 ) * 3
T h e exac t r u l es o f " opera tor p r e c e d enc e " are g i ve n i n App end i x D .
To a vo i d h a ving t o r em em ber all th ese rule s and to mak e yo ur p ro gr a m clea rer , a lw a y s
u s e pare n the s es to d eter min e th e s eq u en c e of e v al ua t i on. The above e xa mpl e is
c l a r i f i ed by w r i ting e ith e r :
2* 3 = 6
6 + 5 = 1 1
or
5 + 2 * 3 co u I d be
5+ 2=7
7 * 3 = 2 1
C o nc epts and Terms of BASIC