If it is required that the sequence produced by successive calls of random/1 be reproducible, seed(Seed) can be called to initialise the calls with the integer Seed.
Success:
      [eclipse]: random(N1), random(N2).
      N1 = 464880439
      N2 = 285401533
      yes.
      [eclipse]: seed(1), random(N).
      N = 2078917053
      yes.
      [eclipse]: seed(1), random(N).
      N = 2078917053
      yes.
Fail:
      random(12345).
Error:
      random(12.34).          (Error 5).