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<!DOCTYPE html>
<html>
<body>
​
<p>If you assign a value to a variable that has not been declared, it will automatically become a GLOBAL variable:</p>
​
<p id="demo"></p>
​
<script>
myFunction();
// code here can use carName as a global variable
document.getElementById("demo").innerHTML = "I can display " + carName;
function myFunction() {
  carName = "Volvo";
}
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/js/tryit.asp?filename=tryjs_local_global by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:39:33 GMT -->
</html>
​
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