Final answer:
In robot programming, a semicolon often follows the last coordinate to signify the end of a command, but it can vary depending on the programming language or system.
Step-by-step explanation:
When writing a robot program, the symbol that immediately follows the last coordinate can vary based on the specific programming language or robotics platform you are using. However, in many cases, a semicolon (;) is used to signify the end of a command or statement in robot programming languages, similar to languages like C++ or Java. It might also be a line terminator or a specific end-of-command character used by the robotic system's programming environment.