From 79b0c9e1283e48f59692886d50b3fd61eb1de5c5 Mon Sep 17 00:00:00 2001
From: Zhao <zhaoh10@nci-02196358-ml.fios-router.home>
Date: Mon, 25 Jan 2021 21:21:40 -0500
Subject: [PATCH] added sum to known functions

---
 knownFunctions.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/knownFunctions.js b/knownFunctions.js
index ff250ec..4c35afe 100644
--- a/knownFunctions.js
+++ b/knownFunctions.js
@@ -94,7 +94,13 @@ export const knownFunctions = {
     if (typeof y == "string" && document.getElementById(y)) {
       y = document.getElementById(y).value;
     }
-    return x - y;
+    return parseInt(x) - parseInt(y);
+  },
+  sum: function (x, y) {
+    if (typeof y == "string" && document.getElementById(y)) {
+      y = document.getElementById(y).value;
+    }
+    return parseInt(x) + parseInt(y);
   },
   percentDiff: function (x, y) {
     if (x == "" || y == "") {