diff --git a/index.js b/index.js
index e69de29bb2d..1705f956a8f 100644
--- a/index.js
+++ b/index.js
@@ -0,0 +1,23 @@
+function shout(string) {
+  return string.toUpperCase()
+}
+function whisper(string) {
+  return string.toLowerCase()
+}
+function logshout(string) {
+  console.log(string.toUpperCase())
+}
+function logwhisper(string) {
+  console.log(string.toLowerCase())
+}
+var uppercase="HELLO!"
+uppercase.toUpperCase() ===
+uppercase
+var lowercase = 'hello!'
+lowercase.toLowerCase() ===
+lowercase
+var mixedCase = 'Hi there!'
+mixedCase.toLowerCase() ===
+mixedCase
+mixedCase.toUpperCase() ===
+mixedCase
\ No newline at end of file