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which statement describes a characteristic of the sas automatic variable error ? a. the error variable maintains a count of the number of data errors in a data step. b. the error variable is added to the program data vector and becomes part of the data set being created. c. the error variable can be used in expressions in the data step. d. the error variable contains the number of the observation that caused the data error.

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Option c is correct. The statement that describes a characteristic of the SAS automatic variable error is the error variable can be used in expressions in the data step.

When a session is launched, SAS automatically creates automatic variables, which are system variables. Automatic macro variables and automatic DATA step variables are both created by SAS. The system-generated variables that are formed when the DATA step is executed have the names of automated variables reserved for them. It is advised against using names in your own apps that begin and conclude with an underscore.

The DATA step or DATA step statements can automatically create variables. However, they are not output to the data set that is being created; instead, they are added to the program's data vector. From one iteration of the DATA step to the next, the values of automatic variables are kept rather than being set to missing.

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