This command is used to improve the performance of demanding programs that require a consistent frame rate.
This command does not return a value.
This is especially true of games. By default, sync is set to off which allows the system to automatically handle screen refreshing. When SYNC ON is used, your program is responsible for handling screen refreshing. You can refresh the screen using the SYNC command. When you want the system to automatically handle screen refreshing again, you can use the SYNC OFF command. By placing the SYNC command at the end of your main program loop, all drawing and refresh tasks can occur in a single call. This dramatically increases the speed and smoothness of graphical operations, allowing your programs to run at their best.
SYNC ON PRINT "only render this when "sync" used" SYNC SYNC OFF PRINT "render this as soon as the command is called" WAIT KEY