More lessons

2 files changed, 17 insertions, 0 deletions

diff --git a/lessons/src/lesson022_case_expressions/code.gleam b/lessons/src/lesson022_case_expressions/code.gleam
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+++ b/lessons/src/lesson022_case_expressions/code.gleam
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+import gleam/io
+import gleam/int
+
+pub fn main() {
+  let result = case int.random(0, 5) {
+    0 -> "It's zero!"
+    other -> "It's " <> int.to_string(other)
+  }
+  io.debug(result)
+}
diff --git a/lessons/src/lesson022_case_expressions/text.html b/lessons/src/lesson022_case_expressions/text.html
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+<p>
+  Patterns in case expressions can also assign variables.
+</p>
+<p>
+  When a variable name is used in a pattern the value that is matched against is
+  assigned to that name, and can be used in the body of that clause.
+</p>