From eb034b6014d9889af589b5052078c3aee49d7fcc Mon Sep 17 00:00:00 2001
From: celestial-applet-1261 <zihan991@gmail.com>
Date: Wed, 10 Mar 2021 15:16:20 +0000
Subject: [PATCH] Done.

---
 README.md | 124 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 index.js  |  29 +++++++++++++
 2 files changed, 153 insertions(+)

diff --git a/README.md b/README.md
index 6999a7b0cd..3f968ac3ef 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,127 @@
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 # JavaScript Arithmetic Lab
 
 ## Objectives
diff --git a/index.js b/index.js
index e69de29bb2..7fce1f1ee2 100644
--- a/index.js
+++ b/index.js
@@ -0,0 +1,29 @@
+var a,b;
+
+function add(a,b) {
+  return a + b;
+}
+function subtract(a,b) {
+  return a - b;
+}
+function multiply(a,b) {
+  return a * b;
+}
+function divide(a,b) {
+  return a / b;
+}
+function increment(n) {
+return  ++n;
+  }
+function decrement(n) {
+return --n;
+}
+function makeInt(n) {
+Number = parseInt(n , 10);  // NaN
+return Number;
+  
+}
+function preserveDecimal(n) {
+ Number = parseFloat(n , 10);  //NaN
+  return Number;
+}