Predefined Functions on Numbers

Apart from the arithmetic operators +, -, *, /, there are quite a few useful predefined functions for working with numbers. These functions live in a predefined Haskell module called Prelude. When starting ghci, it loads the Prelude module by default, which is why you also see it displayed in the prompt of ghci.

Once again, here is a terminal widget, which you can use to run ghci and try out the functions introduced in this lesson.