This function returns whether the ‘Run’ button has been pressed to run the simulation in Roblox Studio.
If the user has pressed ‘Run’, then this function will return true. This function will continue to return true if the simulation has been paused using the ‘Pause’ button. However, once it has been stopped using the ‘Stop’ button it will revert to returning false.
Roblox Studio only enters run mode when the ‘Run’ button is pressed, not the ‘Play’ button. This function will also return false if the simulation was started using
RunService/Run rather than the ‘Run’ button.
RunService test function results
Whether the ‘Run’ button has been pressed to run the simulation in Roblox Studio
This code prints out details of a script’s running context, like if it is running on the server, client, in studio, etc. It uses RunService to do this.
Try pasting this code into a Script or LocalScript. See how it runs in online mode and on a Roblox server (open the developer console).