1 files changed, 13 insertions, 0 deletions
diff --git a/lessons/src/lesson013_functions/code.gleam b/lessons/src/lesson013_functions/code.gleam
new file mode 100644
index 0000000..220e58d
--- /dev/null
+++ b/lessons/src/lesson013_functions/code.gleam
@@ -0,0 +1,13 @@
+import gleam/io
+
+pub fn main() {
+  io.debug(double(10))
+}
+
+fn double(a: Int) -> Int {
+  multiply(a, 2)
+}
+
+fn multiply(a: Int, b: Int) -> Int {
+  a * b
+}