Commodore Plus 4 - Page 167

FUNCTIONS Numeric functions are classified as such because they return num
bers. The functions they perform range from calculating mathematical
functions to specifying a screen location. Numeric functions follow
the form:
Numeric
Functions
FUNCTION (argument)
where the argument can be a numerical value, variable, or string.
ABS(X) (absolute value)
The absolute value function returns the positive value of the
argument X.
ASC(X$)
This function returns the ASCII code (number) of the first character
ofX$.
ATN(X) (arctangent)
Returns the angle whose tangent is X, measured in radians.
COS{X) (cosine)
Returns the value of the cosine of X, where X is an angle measured
in radians.
DEC (hexadecimal-string)
Returns decimal value of hexadecimal-string (0< hexadecimal -
string<FFFF)
EXAMPLE:
N=DEC("F4")
EXP(X)
Returns the value of the mathematical constant e (2.71828183) raised
to the power of X.
FNxx(x)
Returns the value of the user-defined function xx created in a DEF
FNxx statement.
INSTR (string 1, string 2 \ starting-position \)
Returns position of string 2 in string 1 at or afterthe (starting-position].
The starting-position defaults to the beginning of string 2. If no match is
found, a value of 0 is returned.
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