Fichier wallis.ex / 26 fevrier 2000

Welcome to DrScheme, version 101.
Language: Graphical Full Scheme (MrEd).

> (* 4. (wallis 10))
3.002175954556907

> (* 4. (wallis 100))
3.1260789002154112

> (* 4. (wallis 1000))
3.140023818600597

> pi
reference to undefined identifier: pi