What does enabling echo in a terminal application do?

Enabling echo in a terminal application allows the system to repeat or display the input characters that a user types into the terminal window. This feature provides real-time feedback to the user, confirming that their input is being received as intended. For example, when echo is enabled, if you type a command, you will see the characters appear on the screen as you type them.

This functionality is especially useful in interactive command-line applications and scripts, where users need to verify what they are typing. In contrast, if echo were disabled, the input would not be visible, which could lead to confusion, especially when entering commands or sensitive information.

Echo is not related to turning off command inputs, displaying only error messages, or automatically saving typed commands. Instead, it straightforwardly ensures that what you type is shown back to you, enhancing the user experience and interaction within the terminal.