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`@@ -22,6 +22,7 @@ console.log(z); // value of z is entire code of function y.`
`22`	`22`	`When functions are returned from another fun, they still maintain their lexical scope.`
`23`	`23`	`- When y is returned, not only is the fun returned but the entire closure (fun y + its lexical scope) is returned and put inside z. So when z is used`
`24`	`24`	`somewhere else in program, it still remembers var a inside x()`
	`25`	`+- Closure is a very powerful concept of JS, just because this function remembers things even if they are not in their lexical scope`
`25`	`26`
`26`	`27`	`### Uses of Closure`
`27`	`28`	`Module Design Pattern, Currying, Functions like once(fun that can be run only once), memoize, maintaining state in async world, setTimeout, iterators...`

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