Sharp PC-1500 - Random

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C.9. RANDOM
Random numbe rs arc generated by a mathema tical formula and are acc -cssi ble by using the
RND functio n. \"v'henever the compu te' is turned ON, a series of random numbers is ge nerated
by the computer. This list remains unchanged u"less the RANDOM func ti on is used. This means
that a progr<lm w; 11 use the same series of "random" numbe rs each time the compu t er is turned
on. To prevent this. the RANDOM function resets the "seed" used by the fo r mula to gencrotc
its random numbers.
Example 1: Example 2:
10
FOR I = 1
TO 5 10 FOR I = 1 TO 5
15 A = RND 3
15
A = RND 3
20
PR INT A;
20
PRIN T A;
30
NEXT
30
NE XT
Output : , 2 23 1 Output:
12231
To get true random nu mb e rs in t his case the fu nc ti on RA NDOM shou ld appear before t he AND
statement . Th is fun ctio n sovvs a n ew seed in the generation of random numbers and thus causes
the num bers
to differ. Accord in gly, a pr ogram r un under i dent ic al condit i ons will prod uce va ri ed
output' :
Exarn1>lc I:
Example 2:
10 RA NDOM
10
RANDOM
15 FOR I = 1 TO 5 15 FOR I = 1 TO
5
20 A = RND 3 20 A = RND 3
30
PR I NT A;
30
PR INT A;
40 NEX T 40 N EXT
Output:
31223
Ou tput:
23132
C .1 0. STRS
STAS v:orks in a manner o ppo si te to VAL . It '. viii con ve rt an interna l n ume ri c vari ab le back to
its charac t er String r epresentat i on .
1<> INPUT "E NTER A NUMBE A";
20 SS = ST RS (I)
30 PA U SE "THAT NUMBER IS ..
40 PRINT "THE ST RING .. ; SS
The above prog r am accept s a f'IUmber. fo rms the cha racter re 1) resentat ion of th at number and
st
ores it in t he cha ra cter v-0riablc SS. Because t he interna l nu n1e ri c r epresentation cannot be
di
splayed it is " ut omat i ca ll y conv e rted back into a charac ter string by the PR INT statenlent.
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