difference between var keyword and without var

2018-06-05 11:30:21

Possible Duplicate:
Difference between using var and not using var in JavaScript

What is the difference between using var keyword in java script & without using it for a variable?

For example:

var x = 14;

And x = 14;

Are these same or when we declare var x, its a local variable & when it doesn't have var keyword, then its global?

Thanks!

If var keyword is used within a function or other non-global scope then that variable's scope is not global .

If var keyword is not used before a variable name, then that variable's scope is global .

Variables declared outside a function become GLOBAL, and all scripts and functions on the web page can access it.

Global variables are destroyed when you close the page.

If you declare a variable, without using "var", the variable always becomes GLOBAL.

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