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Index Set Expression

{ index-set }

The index set expression returns the members of an index set. This expression is distinguished from a set constructor (see the section "Set Constructor Expression") because it contains a list of set expressions.

The following code uses an index set with a selection expression that excludes the value 3:

  
    proc optmodel; 
       put ({i in 1..5 : i NE 3}); /* outputs {1,2,4,5} */