Describing Functions def square(x): """Return X X""" A function's domain is the set of all inputs it might possibly take as arguments. x is a number A function's range is the set of output values it might square returns a non- possibly return. negative real number A pure function's behavior is the relationship it creates square returns the square of x between input and output.Describing Functions A function's domain is the set of all inputs it might possibly take as arguments. A function's range is the set of output values it might possibly return. A pure function's behavior is the relationship it creates between input and output. def square(x): """Return X * X""" x is a number square returns a non￾negative real number square returns the square of x