HEX$ returns a hexadecimal string representation of a number.
OCT$ returns an octal string representation of a number.
 
HEX$(numeric-expression&)
OCT$(numeric-expression&)
 
    - numeric-expression&    Any numeric expression. The expression is
                             rounded to an integer or long integer before it
                             is evaluated.
 
Example:
    INPUT x
    a$ = HEX$ (x)
    b$ = OCT$ (x)
    PRINT x; "decimal is "; a$; " hexadecimal and "; b$; " in octal."