diff --git a/doc/sample/function.bshell b/doc/sample/function.bshell
new file mode 100644
index 0000000..b7325fa
--- /dev/null
+++ b/doc/sample/function.bshell
@@ -0,0 +1,6 @@
+func test-function($name) {
+    echo "Hello, $name!"
+}
+
+$x = "Jonh"
+test-function $x