What is the following section accomplishing?

[eduar78]

What is the following section accomplishing? */
productSales = INPUT(TRIM(sales), COMMA20.);
SELECT (product);
   WHEN (1)                   productName='Breakfast bar';
   WHEN (2)                   productName='Cookie bar';
   WHEN (3)                   productName='Savory meal bar';
OTHERWISE                     productName=.;
END;
RUN;

What is the following section accomplishing? 

[Kurt_Bremser]

First, it converts a numerical value stored in a character variable into a numeric variable. Next, it creates a long-text character variable from codes in a numeric variable. The "otherwise" branch causes a NOTE concerning a numeric-to-character conversion, because of sloppy coding. The second action is better done with a custom format.