Enable JavaScript in the browser to display LibreOffice Help pages. Error Function 
Returns the error message that corresponds to a value or raises a given error context.
語法 : 
Error
Error(expression)
Error err_code
傳回值類型 : 
String or raised error context
參數: 
If no argument is provided, the Error function returns the error message of the most recent error that occurred during program execution.
expression:  Any numeric expression whose error code can be mapped to an existing error message. An empty string is returned if the error code does not exist.
err_code:  Any value that corresponds to an existing error code.