learning-haskell/02-hello-haskell/2.7-heal-the-sick.md

Exercises: Heal the Sick

Excercise 1

The space between 3. and 14 should be removed.

let area x = 3.14 * (x * x)

Exercise 2

b is unknown is this definition, unless previously defined. The former will generate and error, the latter won't, but the intent of the function is to double the input, so b should be replaced by x

let double x = x * 2

Exercise 3

The line should start at the same indentation.

x = 7
y = 10
f = x + y