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Add convertor from int to Nat

DricomDragon 5 years ago
parent
commit
715cd0c58c
1 changed files with 3 additions and 0 deletions
  1. 3 0
      peano.hs

+ 3 - 0
peano.hs

@@ -3,3 +3,6 @@ data Nat = Zero | Succ Nat
 intValOf thisNat = case thisNat of
 	Zero -> 0
 	Succ nextNat -> 1 + intValOf nextNat
+
+natValOf thisInt = if thisInt == 0 then Zero else Succ (natValOf (thisInt - 1))
+