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sukannya1
Calcite | Level 5

The following SAS program is submitted:

data WORK.LOOP;

X = 0;

do Index = 1 to 5 by 2;

X = Index;

end;

run;

 

how the answer is coming x=5 and Index=7? can anybody explain me what is happening step by step?

3 REPLIES 3
tlnarayana26
Calcite | Level 5

Hi 

  

Here  you we assigned X=0 and index=1  

it increments 1 ,3 ,5 and 7 . In index=5 condition is true then X is 5

and again do loop by 2 value is added (index=7) and condition is falls 

so X=5 and index=7  

 

 

 

RW9
Diamond | Level 26 RW9
Diamond | Level 26

The loop is incremented at the end of the loop.  Hence when the end is hit index gets 2 added to it, but as that is greater than 5 it does not loop back to the do part.

 

ballardw
Super User

Perhaps if you look at the resulting data set done this way it will help.

This creates an output record for each time the loop executes.

data WORK.LOOP;
   X = 0;
  do Index = 1 to 5 by 2;
     X = Index;
      output;
   end;

run;

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