Explain _N_ and _ERROR_ in SAS.

1.	Explain _N_ and _ERROR_ in SAS.
Answer» In a SAS DATA Step, there are two variables that are automatically created, namely, the _ERROR_ variable and the _N_ variable. _N_: Typically, this variable is used to keep track of the number of times a data step has been iterated. It is set to 1 by default. The variable _N_ increases every time the data step of a data statement is iterated. _ERROR_: The VALUE is 0 by default and gives INFORMATION about any errors that OCCUR during execution. Whenever there is an error, such as an input data error, a math error, or a conversion error, the value is set to 1. This variable can be used to locate errors in data records and to display an error message in the SAS log.

Answer»

In a SAS DATA Step, there are two variables that are automatically created, namely, the _ERROR_ variable and the _N_ variable.

_N_: Typically, this variable is used to keep track of the number of times a data step has been iterated. It is set to 1 by default. The variable _N_ increases every time the data step of a data statement is iterated.
_ERROR_: The VALUE is 0 by default and gives INFORMATION about any errors that OCCUR during execution. Whenever there is an error, such as an input data error, a math error, or a conversion error, the value is set to 1. This variable can be used to locate errors in data records and to display an error message in the SAS log.

Discussion