Which command is used to close all open figure windows in MATLAB?

The command used to close all open figure windows in MATLAB is "close all." This command effectively instructs MATLAB to close every figure window that has been created during the current session. It is beneficial when working with multiple figures, ensuring that your workspace becomes uncluttered and more manageable.

The other commands serve different purposes: "clear all" is used to remove all variables from the workspace, which does not affect the figure windows. "quit" and "exit" are commands to terminate the entire MATLAB session rather than just closing figure windows. Understanding the specific functionality of these commands is important for efficient use of MATLAB in your engineering practices.