Commodore VIC-20 - Page 386

372 The VIC 20 User Guide
If the string is longer than one character, ASC returns the ASCII code
for the first character in the string. The returned argument
is a number and
may be used in arithmetic operations. ASCII codes are listed in Appendix
A.
Example:
ATN
?ASC(IIA")
X-FlSCCHS")
?X
Prints 65
Prints the ASCII value of "S," which is 83
A TN returns the arctangent of the argument.
Format:
ATN(data n)
A TN returns the value in radians in the range ± 17.
Example:
CHR$
AIIATNCAO)
?1801f*ATN(A)
CHR$ returns the string representation of the specified ASCII code.
Format:
CHR$(byte)
CHR$ can be used to specify characters that cannot be represented in
strings. These include a carriage return and the double quotation mark.
Example:
IF C.=CHR'(13) GOTO 10
Branch if C$ is a carriage return (CHR$(13»
?CHR'(34) : "HOHOHO" : CHR$(34) Print the eight characters "HOHOHO" (where
CHR$(34) represents a double quotation mark)