Question

what is error alert command

Answer 1

An error message alertsusers of a problem that has already occurred. By contrast, a warningmessage alerts users of a condition that might cause a problem in the future. Error messages can be presented using modal dialog boxes, in-place messages, notifications, or balloons. A typical modal error message.

Answer 2

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Error message: An error message is information displayed when an unexpected condition occurs, usually on a computer or other device. ... Error messages are seen widely throughout computing, and are part of every operating system or computer hardware device.

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