Sharp PC-1403 - Page 83

77
&A = 10
& 10 = 16
&100 = 25 6
&FFFF = 65535
T h e d ec imal s y s t e m i s o nl y on e of many diffe r ent s yst e m s t o rep re s ent numbers .
An ot h er wh i c h has be co me qui te i mportant w hen us i n g c ompute rs is the h e xa d ec imal
num be r ing system . The hex a de ci m al sy ste m i s b as ed on 16 i n stead of 10 . To w r i t e
he x a de ci m a l numbers , y o u use t he f amiliar 0 to 9 and 6 mo r e " d ig its ": A , B , C , D ,
E , a nd F . These cor r e s p o nd to 10 , 11 , 12 , 13, 14 , and 1 5 . When y ou wan t th e
co m p ute r t o treat a n um ber as he x ade c imal , put an am p e rs and ' & ' c haracter in
fro n t o f t h e numeral :
Hexadecimal Numbers
" ISN"T "
N o e nd in g quote
Q u ot e c a n ' t be us e d within a stri ng
" COMPU T ER
The f oll owin g a r e not v al i d st rin g consta nts:
"HELLO ''
"GOODB YE "
" SHAR P C OMPU T ER "
1 2 3 4 5 6 7 8 9 0
AB CD EFGHI J K L MNOP Q R S TU V W XY Z
" # $ % & ( ) * + -. / :; < = > ?@ v 7T ""
In BA S IC , a co lle cti o n o f cha rac t e rs is c al l ed a string . Fo r th e comput e r to te ll the
differ e n ce b e t w ee n a s t rin g an d other pa rts of a progr a m, s u c h a s v e r b s or va r i a bl e
name, yo u mu s t e n c l ose t he c h ar a c ters of th e string i n q uo t at i o n m a r k s ( " ).
T h e foll o w i ng a r e e x am p l e s o f string con s tan ts :
I n addi ti o n to num bers , t here a r e m a n y wa y s t h at t h e SHARP COMPUTER uses l e tt e r s
a nd sp e c ial s ym bo l s . Th e s e l e tte r s, n um ber s , a nd s pe cia l sy m bols a r e ca ll e d
c hara c t e rs . Th es e c ha r ac te r s a re ava il ab le on t he c omp ut er .
String Constants
In th i s c h a p te r, w e will e x a m i ne so me c oncep t s a nd ter m s o f t h e B A SI C l angu a ge .
', I I l ' ' I I • ~
I • ' ' ' CHAR'IE84 . '
. . · . .. CONCEPTSANDTFE'RMSOFBASIC , . '
I
Concepts and Terms of BASIC