Infinity and NaN

Developers
4 
module {
  public func isNaN(v:Float): Bool {
    return ((v < 0.000) == false) and ((v > 0.000) == false)
  };
  public func isInfinite(v:Float): Bool {
    return v > 1.8e307 
  }
}

This is the method I wrote to judge NaN and Infinity, what’s wrong with it. . if so. Please point out where I am wrong