Final answer:
In drill and ceremony, when the command HALT from Right (Left) step is given, one additional step is taken before the individual comes to a full stop.
Step-by-step explanation:
When given the command HALT from Right (Left) step, typically one additional step is executed before halting. This means if the order is given, then the individual should take one more step in the direction indicated by the command (right or left) before coming to a full stop. It is a drill movement used in various forms of military and cadet training to ensure uniformity and precision in maneuvers.