From 6fd5e034826f02e0a578ec6b4aa962079e99aedd Mon Sep 17 00:00:00 2001
From: Juan Marco <jmmarco@gmail.com>
Date: Wed, 22 Jun 2022 10:18:44 +0200
Subject: [PATCH] Fix NaN input for Battle

---
 09_Battle/javascript/battle.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/09_Battle/javascript/battle.js b/09_Battle/javascript/battle.js
index 8ffb7fa0..46c2ccd0 100644
--- a/09_Battle/javascript/battle.js
+++ b/09_Battle/javascript/battle.js
@@ -258,6 +258,11 @@ async function main()
         print("START GAME\n");
         while (1) {
             str = await input();
+            // Check if user types anything other than a number
+            if (isNaN(str)) {
+                print("INVALID INPUT. TRY ENTERING A NUMBER INSTEAD.\n")
+                continue
+            }
             x = parseInt(str);
             y = parseInt(str.substr(str.indexOf(",") + 1));
             if (x < 1 || x > 6 || y < 1 || y > 6) {