Question 37 :

 Which one of the following is true of the RETAIN statement in a SAS DATA step program?

1. It can be used to assign an initial value to _N_ .
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 Correct Answer : 4

 Exp : It adds the value of an expression to an accumulator variable and ignores missing values.

 The RETAIN statement

 - is a compile-time only statement that creates variables if they do not already exist

 - initializes the retained variable to missing before the first execution of the DATA step if you do not supply an initial value

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