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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(); 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], Fri, 23 Jan 2015 07:35:39 GMT --> </html>
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