Radio Shack TRS-80 100 Quick Reference Manual page 9

D
ATAeonttifil
N*f
Detass
a set of
constants {numeric
»nfl.*i
string)
to
be
accessed by
a
BEAD
command
DATA
10?5.5Q15."Probabi!il'es
.'Total
DATES
Keeps
wacfcolrrieciirrent date.
in
string
farm You may
access
1
*e any
slung
variable
PRINT DA1F$ DATES - "
1 1
<02«2
DAYS
Keepslrer*ofmec^entdayofthewe«kin
siring
form You
may
access
DAYS
like
any
string
vflMM
o
*RINT DAYS
CAYS
-
Trf
D£*D0LMaVlrt
Defines a«
of
rhe vamBloswhicriDepjnwtththe
letters
m/efte'SU
mo be doube
precision
vanabies Letter Asf
constats
of indlvlOjal
oners andta
t
letter
ranges
ol
the
form
letter! -letterZ
lOOCCFOBLO.
X-Z
OEF1NT
fetter
Hal De'ineiiallotlrievanabies¥»r«cM)eginw'ltiti
flliei^in/aTO'^sMoDenie^eivdnaDias
lefle/nsfconsstsot
irWrvnduailettersandorfltte'rangesofltieloimlenerl-ieBfirt
DEFtMD.
X-Z
DEFSNG
letter
Utt
Defines
a'l
olthe variables
winch begin
w»th the
letter
s
m
farm
m
I
to
ba single precision vatrab
ies letter
lis (
consists
ol
rotviduai
letters ano-or
letter
ranges
ol
me form
letter
1 -letter
2
CEF5NGQ
X-2
DEFSTB
tetter Met Defines
all of
lf» var tables wNcii begi
n with
me
letter! in Letter hai 10
06
String variables 'effe'Vs'consislsof
individual letters and.
or
letter
ranges
of
the
form
letleM
-letter?
CEFSTBO.X.Z
DIM
variable narnef-rJirnenslone) Ht Defines
vanmbtonam* as
an
array with the
given ^.menaiona. dimensions
is
a
Sst ot
one
or
more
numeric
expressions, defining the "length",' vwott. and
soon
for
the array.
CIMAS(lfJ!
8AL%(1O.I0,
EWT
Htm
number
range
Enter
text
ed* Ing
mode
using
tti©
grven
EDIT'CAIOCO EST
6OT-200
EMO
Terminates execution
ol
the
BASIC
program
END
CRL
Returns theiinenumberc'lhelaai
error
IFEHL -
MOTMENRESUME
'50
ERR
Returns the
error code numderoltnelastenor
FERR
-flTr-ENPESUME
u
tRAORn(<inenceiprMSi«n
Simt*ate&
Pie
error
sp^cmed by
numeric
expressfo/>
EPPOR3*
FRRORFRR
FSeturnsthee«poneotial
(antilogjo'
EXPfnumer
ic
expression/
numeric
exoressron
PfllNT£XP:M|
nX'flUfTwttenpfetsJortJ Retulhifhewnolenumberportionol
rmme'fc
expression.
10A%-HX(A?#|
FOR
countarvarlaoie
initial
value
TO
final
value
STEP
increment
NEXTceunrervariabfe
txecutestnecommanos between
ire
FOR command
and
the
NEXTcommend
repetitively,
varying
coukIbt
variable
t
rom
initial
value to Ana'
v«W
.
adding
'mcemoni
to
rl
each
time
BASC
ends
the cop.
F0RI*lTO100STE
D
4(
)
NEXT
I
F
RE/
express!
on
J
Returns
Ifiecurrent arrount
ot
unused numeric
memory
in bytes
when
expression
i
s
r*jmenc and the
current
total
amount
of
unused
sinng space when
express-on
is stnng-type.
TRE(O) VRET
"!
GOSUB
ifrae
number
Transfers
program
control to
thn subroutine
beginm ng
at
«ne
notnbet.
GOSUB
1
000
GOTO
Nne
number
Writer.
GO'Q
1000
HIMEM
FWft)frfflthelc*ao\y6ssofmorroryavalableto
BASIC
'hlMEW
lFrelattonalorlor^cw/e»pre>ilcmIHENcr>/nrna/«d(8)lELSE
comrnand(B>2
Teststhe ogicarirutfh o>t*taOonato>K>g'caJ
expression.
Ifthe
expressonis
true",
then
BASIC
executes
canmajt0(3}
I
K
the expression
is "false".
BASIC
executes
corrvnaflclfi)?.
If
A>B Th£
N GC/TO lOO
ELSE lts«JT A.©
Branches program
oontro
l
to
|h«
spec
(lied ftne
INP
fport
number)
number.
A%
=
ihjpjsj
Ret urns a
byte
trom the
specified
CPU
port
14