Which programming command is used to repeat the input you type back to a terminal or application window?

The command used to repeat the input you type back to a terminal or application window is "Echo." This command takes the input provided and displays it back to the user, which is particularly useful in scripting and command-line interfaces for providing user feedback. When you type a command that includes "echo," it serves to confirm the user's input or to display messages without further processing.

For instance, in many programming languages and shell environments, you can use "echo" to show variable values or simple text messages. This helps in debugging code by allowing developers to see what data is being handled or where errors might be occurring.

In contrast, "Print" is often associated with displaying output in various programming languages but typically refers to a specific function or method rather than simply repeating input. The terms "Return" and "Output" do not specifically refer to the action of mirroring input in a terminal context, making "Echo" the most accurate choice in this scenario.