From Multi Theft Auto: Wiki
This retrieves the analog control state of a control. This is useful for detecting sensitive controls, such as those used on a joypad.
- controlName : the name of the control you wish to get the analog state of. Possible values are:
Returns a float between 0 and 1 indicating the amount the control is pressed.
/analog command starts to go forward control state if you are not, if you are going forward by control state then you will stop.
This example written by Samurai