What is this?
You can run Haskell code directly from his website.
Every code block in these lecture slides points to one of the sections below.
Jumping into GHCi
main = putStrLn (show number)
-- show
number = 4317 * 103
-- /show
main = putStrLn (show output)
-- show
x = 3.0
y = 4.0
output = sqrt( x^2 + y^2 )
-- /show
main = putStrLn (show number)
-- show
number = 2^1000
-- /show