CHR$
ASC
LEN
LOG
Returns the natural logarithm of the argument.
RND
Generates a random number. There are some rules regarding use
of RND; they are described in Chapter
4.
SIN
Returns the trigonometric sine of the argument.
which
is
treated
as
a radian quantity.
COS
Returns the trigonometric cosine of the argument.
which
is
treated
as
a radian quantity.
TAN Returns the trigonometric tangent of the argument.
which
is
treated
as
a radian quantity.
ATN Returns the trigonometric arctangent of the argument.
which
is
treated
as
a radian quantity.
Arithmetic
functions perform
commonly
needed arithmetic operations on a
single argument. Here are some examples:
INT(A) Returns the integer value of
A.
SQR(144) Returns the square root of 144 (j.e
..
12).
SIN(BX(1.0)) Returns the sine of array element BX(1.0).
The following functions constitute the string function group:
STR$
Converts a number
ta
its equivalent string of
text
characters.
VAL
Converts a string of
text
characters
to
their equivalent number (if
su
ch a conversion
is
possible).
Converts
an
8-bit
binary code
to
its equivalent ASCII character.
Converts
an
ASCII character
ta
its
8-bit
binary equivalent.
Returns the number of characters contained in the
text
string
identified by the argument.
LEFT$ Extracts the left part of a
text
string. Function arguments identify
the string and its left part.
RIGHT$ Extracts the right part of a
text
string. Function arguments iden-
tif
y the string and its
right
part.
MID$
Extracts the middle section of a
text
string. Function arguments
identify the string and the required mid part.
String functions let vou determine the length of a string. extract portions of
a string. and convert between numeric. ASCII. and string characters. These func-
tions take one. two. or three arguments. Here are some examples:
STR$(14) Converts 14 to
"14".
LEN("ABC"l
Returns the length of the string. 3
is
returned since the
string
has
three characters.
72
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