/*****************************************************************************************************************
 
SAS file name: return_statement.sas
File location: 
__________________________________________________________________________________________________________________
 
Purpose: To demonstrate the inner workings of the Return Statement in the SAS Data Step.
Author: Peter Clemmensen
Creation Date: 07/03/2020
 
This program supports the blog post "Understand the Return Statement in SAS Data Step" on SASnrd.com

*****************************************************************************************************************/

/* Example Data */
data have;
input x y;
datalines;
1 1
1 2
2 3
2 4
;

/* A data step has an implicit output and return statement */
data want;
   set have;

   output;
   return;
run;

/* Somewhat comparable to the Delete Statement */
data return;
   set have;
   if x = 2 then return;
   *output;
run;

data delete;
   set have;
   if x = 2 then delete;
run;

/* The Go To and Link Statemnets */
data goto;
   set have;
   link here;
   here : do;
             output;
             return;
          end;
run;

data link;
   set have;
   goto here;
   here : do;
             output;
             return;
          end;
run;