1.2.2 Numbers

Real numbers aren't particularly important in typical Prolog applications. So although most Prolog implementations do support floating point numbers or floats (that is, representations of real numbers such as 1657.3087 or ) we are not going to discuss them in this course.

But integers (that is: ... -2, -1, 0, 1, 2, 3, ...) are useful for such tasks as counting the elements of a list, and we'll discuss how to manipulate them in a later lecture. Their Prolog syntax is the obvious one: 23, 1001, 0, -365, and so on.