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elixir/guessing-game/HINTS.md

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+# Hints
+
+## General
+
+- In Elixir's ['Getting Started Guide'][guide] there is a nice refresher about named functions.
+
+## 1. Make the response when the guess matches the secret number
+
+- You can use a [guard][guard] to check if the numbers are the same with `===/2`.
+
+## 2. Make the response when the guess is greater than the secret number
+
+- You can add a [function clause][multiple-fn-clauses] and [guards][guard] to check if the guess is greater `>/2` than the secret number.
+
+## 3. Make the response when the guess is less than the secret number
+
+- You can add a [function clause][multiple-fn-clauses] and [guards][guard] to check if the guess is less than `</2` the secret number.
+
+## 4. Make the responses when the guess is one more or one less than the secret number
+
+- You can add a [function clause][multiple-fn-clauses] and [guards][guard] to check if the guess is one less or one more than the secret number.
+- Guards expressions can use `and/2`, or `or/2` to combine boolean expressions.
+- Pay attention to the order of the function clauses.
+
+## 5. Make the response when there is no guess
+
+- You can make use of a [default argument][default-arg] for a guess. The default value does not have to be an integer.
+- Use a function header before all the other function clauses to define the default argument.
+
+[default-arg]: https://elixir-lang.org/getting-started/modules-and-functions.html#default-arguments
+[guard]: https://hexdocs.pm/elixir/master/Kernel.html#guards
+[guide]: https://elixir-lang.org/getting-started/modules-and-functions.html#named-functions
+[multiple-fn-clauses]: https://elixir-lang.org/getting-started/modules-and-functions.html#named-functions