Commodore 128D - Page 323

Basic Functions
n
ABS
ASC
f )
ATN
The format of the function description is:
FUNCTION (argument)
where the argument can be a numeric value, variable or string.
Each function description is followed by an EXAMPLE. The lines
appearing in bold face in the examples are the functions you type in.
The line without bold is the computer's response.
—Return absolute value
ABS(X)
The absolute value function returns the positive value of the argu
ment X.
EXAMPLE:
PRINT ABS (7*(-5))
35
—Return CBM ASCII code for character
ASC(X$)
This function returns the ASCII code of the first character of X$. You
no longer have to append CHR$(0) to a null string. ILLEGAL QUAN
TITY ERROR is no longer issued.
EXAMPLE:
X$ = "C128":PRINT ASC (X$)
67
—Return angle whose tangent is X radians
ATN (X)
This function returns the angle whose tangent is X, measured in radi
ans.
EXAMPLE:
PRINT ATN (3)
1.24904577
315 BASIC 7.0 ENCYCLOPEDIA-Basic Functions