112
The
VIC
20
User
Guide
arguments
D$
and 2 are enclosed in parentheses. Generally stated, any
function
will
have one of the following two formats:
r-r
-------
Single argument for a function
+ that has just one argument
function (argl)
T
'U":
(T-La_rg_2_)
_____
Two arguments for a function
_ that needs two arguments
Letters that specify the function
A
few
functions need three arguments. Each function argument can
be
a
constant, a variable,
or
an expression.
A function appearing in a BASIC statement
is
evaluated before any
operators. Every function in a BASIC statement is reduced to a single
numeric or string value before any other part of the BASIC statement
is
evaluated. For example, in the following statement the
SQR
and SIN
functions are evaluated first:
10
B=24.7'(SQR(C)+5)-SIN(0.2+D)
Suppose SQR(C) = 6.72 and SIN(0.2 + D) = 0.625. The statement
on line
10
will
first
be
reduced to
10
B=24.
7*(6. 72+5)-0.
625
This simpler statement
is
then evaluated.
Arithmetic
Functions
Here
is
a list of the arithmetic functions that can be used with VIC
BASIC.
INT Converts a floating point argument to its integer
equivalent by truncation.
SGN Returns the sign
of
an argument: + I for a positive
argument,
-I
for a negative argument, 0 for 0
argument.
ABS
Returns the absolute value
of
an argument. A
positive argument does not change; a negative
argument
is
converted to its positive equivalent.
SQR Computes the square root of the argument.
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