Letters to the editor

  title={Letters to the editor},
  author={A. Perlis},
The object of this note is to advocate that the IALI language be extended to include two additional notations: conditional expressions and recursive definitions. We shall describe the notations first and then argue for their inclusion in the language. IAL as presently proposed already allows propositional or Boolean expressions which have truth values (T or F) as values. Examples of such expressions are X<Y ((X < 3) V (y > Z» A P In the last example X and Yare numerical quantities while P is a… Expand