diff --git a/Chapter 12/Exercise 12.5 b/Chapter 12/Exercise 12.5
new file mode 100644
index 0000000..42613ec
--- /dev/null
+++ b/Chapter 12/Exercise 12.5	
@@ -0,0 +1,15 @@
+function test(val) {
+    try {
+        if (isNaN(val)) {
+            throw "Not a number";
+        } else {
+            console.log("Got number");
+        }
+    } catch (e) {
+        console.error(e);
+    } finally {
+        console.log("Done " + val);
+    }
+}
+test("a");
+test(100);