Exercises
1. Try using `:type` on the literal value `"H"` (notice the double quotes). What happens? Why?
2. Try using `:type` on the literal value `'Hello World'` (notice the single quotes). What happens? Why?
1. "H" is a `String` with just one element.
2. 'Hello World' is invalid because `Char`s consist of only one character.
Exercises

What are the types of the following functions? For any functions involving numbers, you can just pretend the numbers are Ints.

1. The `negate` function, which takes an Int and returns that Int with its sign swapped. For example, `negate 4 = -4`, and `negate (-2) = 2`
2. The `(||)` function, pronounced 'or', that takes two Bools and returns a third Bool which is True if either of the arguments were, and False otherwise.
3. A `monthLength` function which takes a Bool which is True if we are considering a leap year and False otherwise, and an Int which is the number of a month; and returns another Int which is the number of days in that month.
4. `f x y = not x && y`
5. `g x = (2*x - 1)^2`
1. `negate :: Int -> Int`
2. `|| :: Bool -> Bool -> Bool`
3. `monthLength :: Bool -> Int -> Int`

And in the second round:

1. `f :: Bool -> Bool -> Bool`
2. `g :: Int -> Int`