Scope
scope refers to an area within which a function and its variables are accessible.
Functions can have two scope
scope refers to an area within which a function and its variables are accessible.
Functions can have two scope
- Global - specifies that a function can be accessed from anywhere in the program.
- Local - specifies that a function can be accessed within the parent function.
Closure
A closure is a variable that is created inside a function and continues to exist after the function has finished executing.
Example
<!DOCTYPE html>
<html>
<head>
<title>javaScript function scope</title>
</head>
<body>
<h1>JavaScript function scope</h1>
<script>
function func_global()
{
var name = "closure";
func_local();
function func_local(name)
{
document.write("I am in Local Scope <br />");
}
document.write("I am in Global Scope & name is " + name);
}
func_global();
</script>
</body>
</html>
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