Commodore 128D - Page 327

I ■ )
n
INT
JOY
string 2 is null, INSTR returns the value of the STARTING POSITION
or the value 1.
EXAMPLE:
PRINT INSTR ("COMMODORE 128","128")
11
—Return integer form (truncated) of a floating point value
INT(X)
This function returns the integer value of the expression. If the
expression is positive, the fractional part is left out. If the expression
is negative, any fraction causes the next lower integer to be
returned.
EXAMPLES:
PRINT INT(3.14)
3
PRINT INT(-3.14)
-4
—Return position of joystick and the status of the fire button
JOY(N)
when N equals:
1 JOY returns position of joystick 1.
2 JOY returns position of joystick 2.
Any value of 128 or more means that the fire button is also pressed.
To find the JOY value, add the direction value of the joystick plus 128,
if the fire button is pressed. The direction is indicated as follows:
LEFT
RIGHT
319
EXAMPLES:
JOY (2) =135
Joystick 2 fires to the left: (128 + 7).
IF (JOY (1) >127) THEN PRINT "FIRE".
Determines whether the fire button is pressed on joystick #1.
BASIC 7.0 ENCYCLOPEDIA-Basic Functions