let Integer/nonPositive =
      https://raw.githubusercontent.com/dhall-lang/dhall-lang/v22.0.0/Prelude/Integer/nonPositive.dhall
        sha256:e00a852eed5b84ff60487097d8aadce53c9e5301f53ff4954044bd68949fac3b

let Integer/nonNegative =
      https://raw.githubusercontent.com/dhall-lang/dhall-lang/v22.0.0/Prelude/Integer/nonNegative.dhall
        sha256:b463373f070df6b1c8c7082051e0810fee38b360bab35256187c8c2b6af5c663

let isZero
    : Integer → Bool
    = λ(v : Integer) → Integer/nonPositive v && Integer/nonNegative v

let example0 = assert : isZero +2 ≡ False

let example1 = assert : isZero +0 ≡ True

in  isZero