Haskell interpreter can be downloaded from Haskell home page.
When executed, it looks like this:
Haskell Interpreter WinGHCi.
The string 'Prelude>' is the Haskell prompt.
Haskell interpreter can be used as calculator, as follows:
WinGHCi used as Calculator.
In this blog we won't teach any programming language though, except for explaining basics needed to understand exercises.
(Source: [1]).
