diff --git a/rustbyexample/fn.d/closures.rs b/rustbyexample/fn.d/closures.rs
new file mode 100644
index 0000000..c4f62f4
--- /dev/null
+++ b/rustbyexample/fn.d/closures.rs
@@ -0,0 +1,12 @@
+fn main() {
+    let outer_var = 42;
+
+    let closure_annotated = |i: i32| -> i32 { i + outer_var };
+    let closure_inferred = |i| i + outer_var;
+
+    println!("closure_annotated: {}", closure_annotated(1));
+    println!("closure_inferred: {}", closure_inferred(1));
+
+    let one = || 1;
+    println!("closure returning one: {}", one());
+}