1 if restriction_criteria; statement 2 output; statement 3 assignment statments eg if minage < 20 ; minage = min(age); /* This statment should be above IF statment*/
first preference goes to run; next - placement of ; if you use datalines next - use of infile and input next - use of retain and length statements
Keep, Drop and Rename can also play a critical role if you are using some of the variables listed in them.
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