The OPTMODEL Procedure

DO UNTIL Statement

DO UNTIL ( logic-expression ) ; statement(s) ; END;

The DO UNTIL loop executes the specified sequence of statements repeatedly until the logic-expression, evaluated after the statements , returns true (a nonmissing nonzero value).

For example, the following code outputs the values 1 and 2:

  
    proc optmodel; 
       number i; 
       i = 1; 
       do until (i=3); 
          put i; 
          i=i+1; 
       end;
 

Note that multiple criteria can be introduced using expression operators, as in the following example:

  
    do until (i=3 and j=7);
 

For a list of expression operators, see Table 6.3.