<!DOCTYPE html>
<html>
<body>
<h1>Undeclared Variables in Strict Mode</h1>
<p>Please Check Console(F12)</p>
<script>
"use strict";
function Myfunction() {
str = "WebTutor";
return str;
}
console.log(Myfunction()); // Please Check Console
</script>
</body>
</html>