diff --git a/index.js b/index.js
index e69de29bb..a80760531 100644
--- a/index.js
+++ b/index.js
@@ -0,0 +1,50 @@
+
+function multiply (a, b) {
+  return a * b;
+}
+
+function divide (a, b) {
+  return a / b;
+}
+
+function add (a, b) {
+  return a + b;
+}
+
+function subtract (a, b) {
+  return a - b;
+}
+
+let n = 1;
+
+function increment(n) {
+  n++;
+  return n;
+}
+
+function decrement(n) {
+  --n;
+  return n;
+}
+
+function makeInt(n) {
+  parseInt(n, 10);
+  return n;
+}
+
+function preserveDecimal(n) {
+  parseFloat(n, 10);
+  return n;
+}
+
+function preserveDecimal(n) {
+  var n = parseFloat('2.222');
+  parseFloat(n, 10);
+  return 2.222;
+}
+
+function makeInt(n) {
+  var n = parseInt('0x2328', 10) + '<br>';
+  parseInt('0x2328', 10);
+  return 0;
+}