diff --git a/week-7/typescript-assignment/index.ts b/week-7/typescript-assignment/index.ts
new file mode 100644
index 000000000..0ec42a094
--- /dev/null
+++ b/week-7/typescript-assignment/index.ts
@@ -0,0 +1,12 @@
+type Pair<T> = [T, T];
+
+function swapPair<T>(a: T, b: T): Pair<T> {
+  return [b, a];
+}
+
+const output1: Pair<number> = swapPair(1, 2);
+const output2: Pair<boolean> = swapPair(true, false);
+const output3: Pair<string> = swapPair("c", "a");
+const output4: Pair<string> = swapPair("c", 1); // error since mismatch types
+
+console.log(output4);