Radio Shack TRS-80 User Manual page 235

Built-in
Described
in
Functions
Description
Example
Chapter(s)
MEM
Returns the
number
of
free
bytes
left in
memory
10
PRINT
MEM
8
INT(X)
Returns the
greatest
integer
which
is
less
than
or
equal
to
X
10I=INT(Y)
14
ABS(X)
Absolute value of
X 10M=ABS(A)
17
RND
(0)
Returns
a
random
number between and
1
10X=RND(0)
19
RND(N)
Returns
a
random
integer
between
landN
10X=RND(500)
19
Math
Described
in
Operators Function Example
Chapters)
+
Addition
A+B
3
-
Subtraction
A-B
3
*
Multiplication
A*B
3
/
Division
A/B
3
Assigns value of
right-
hand
side to variable
on
left-hand side
A=B
3
Relational Described
in
Operators Relationship Example Chapters)
<
Is
less
than
A<B
6
>
Is
greater
than
A>B
6
=
Is
equal to
A=B
6
<=
Is less
than or equal
to
A<=B
6
>=
Is
greater
than
or equal to
A>=B
6
Is
not equal to
AOB
6
Logical Described
in
Operators Function Example
Chapter(s)
*
AND
(A=3)*(A=7)
"A
equals
3
and
A
equals
7"
24
+
OR
(A=3)+(B=7)
"A
equals 3
or
B
equals
7"
24
Variables Purpose
A
through
Z
Take on number
values
A$
and B$ Take on
string
values
A(X)
Store the elements of
a one-dimensional
array
Described
in
Example
Chapter(s)
A=3.14159
3
AS=RADIO SHACK
16
A(0)=400
21
LEVEL
I
Shorthand
Dialect
Command/Statement
Abbreviation
Command/Statement
Abbreviation
PRINT
P.
TAB
(after
PRINT)
T.
NEW
N.
INT
I.
RUN
R.
GOSUB
GOS.
LIST
L.
RETURN
RET.
END
E.
READ
REA.
THEN
T.
DATA
D.
GOTO
G.
RESTORE
REST.
INPUT
IN.
ABS
A.
MEM
M.
RND
R.
FOR
F.
SET
S.
NEXT
N.
RESET
R.
STEP
(after
FOR)
S.
POINT
P.
STOP
ST.
PRINT AT
P.A.
CONT
C.