mirror of
https://github.com/idris-lang/Idris2.git
synced 2024-12-21 02:31:50 +03:00
19 lines
333 B
Idris
19 lines
333 B
Idris
|
data Bool = False | True
|
||
|
|
data Nat = Z | S Nat
|
||
|
|
|
||
|
|
not : Bool -> Bool
|
||
|
|
not False = True
|
||
|
|
not True = False
|
||
|
|
|
||
|
|
isZero : Nat -> Bool
|
||
|
|
isZero Z = True
|
||
|
|
isZero (S k) = False
|
||
|
|
|
||
|
|
isOdd : Nat -> Bool
|
||
|
|
isOdd Z = False
|
||
|
|
isOdd (S k) = not (isOdd k)
|
||
|
|
|
||
|
|
testZ : Nat -> String
|
||
|
|
testZ x = if isZero x then "Zero" else
|
||
|
|
if isOdd x then "Odd" else "Even"
|