JavaScript Scope

In JavaScript the scope of a variable is the region of your program in which it is defined. JavaScript variables have only two scopes.
Global Variables − A global variable has global scope which means it can be defined anywhere in your JavaScript code.
Local Variables − A local variable will be visible only within a function where it is defined. Function parameters are always local to that function.

Example of JavaScript Variables Scope


Syntax

This is an example to test the scope the variable.

<html>
<body onload = checkscope();>
<script>
<!--
var myVar = "global"; // Declare a global variable
function checkscope( ) {
var myVar = "local"; // Declare a local variable
document.write(myVar);
}
//-->
</script>
</body>
</html>          
        







The Best

Comment here

If you have any query, if you want to know something about any of technical course related to computer science field, if you have any suggestion about relevant to uploaded content or if you anything wrong here (any mistake in content) than please contact us. Keep in mind, comment should be according to community guidelines.