diff --git a/exo5_debug.ts b/exo5_debug.ts
new file mode 100644
index 0000000000000000000000000000000000000000..f0fac0f6f129a59980ca22e7b5f1c30767331677
--- /dev/null
+++ b/exo5_debug.ts
@@ -0,0 +1,11 @@
+function deb3(xy: number []): void {
+    let tmp = xy[0];
+    xy[0] = xy[1];
+    xy[1] = tmp;
+    xy = [100, 200];
+    console.log(xy);
+}
+
+let xy = [10, 20];
+deb3(xy);
+console.log(xy);
\ No newline at end of file