phy_position_y;
Returns: Real
This variable can be used to get (or to set) the y position of the instance within the game room physics world. Please note that the physics world may present errors when instances are moved by directly
setting this variable as it will interrupt the continuous simulation.
xx = phy_position_x;
yy = phy_position_y;
The above code stores the instance x and y position in two variables.