diff --git a/calculator.js b/calculator.js
index 661bc4d..9d72219 100644
--- a/calculator.js
+++ b/calculator.js
@@ -12,3 +12,7 @@ let op = prompt("What operation? ");
 if (op == "+") {
 	console.log(Number(c) + Number(d));
 }
+
+if (op == "-") {
+	console.log(Number(c) - Number(d));
+}