diff --git a/index.js b/index.js
index e69de29..0397b14 100644
--- a/index.js
+++ b/index.js
@@ -0,0 +1,34 @@
+function add(num1, num2) {
+  return num1 + num2
+}
+
+function subtract(num1, num2) {
+  return num1 - num2
+}
+
+function multiply(num1, num2) {
+  return num1 * num2
+}
+
+function divide(num1, num2) {
+  return num1 / num2
+}
+
+function inc(n) {
+  return n += 1
+}
+
+function dec(n) {
+  return n -= 1
+}
+
+function makeInt(n, base) {
+  if (base === undefined) {
+    base = 10;
+  }
+  return parseInt(n, base)
+}
+
+function preserveDecimal(n) {
+  return parseFloat(n)
+}