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Commit d841753

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Ram swaroop

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Original file line number	Diff line number	Diff line change
`@@ -376,7 +376,42 @@ and they live until the instance is removed.`
`376`	`376`	`local variables can be alive and still be "out of scope".`
`377`	`377`	`4. __Block__ variables live only as long as the code block is executing.`
`378`	`378`
	`379`	`+Below program shows all types of variables and explains their scopes too. Please refer to the comments to understand which`
	`380`	`+are __in scope__ and which are __out of scope__.`
`379`	`381`
	`382`	`+{% highlight java linenos %}`
	`383`	`+class Scope {`
	`384`	`+ static int s = 343; // static variable`
	`385`	`+ int x; // instance variable`
	`386`	`+`
	`387`	`+ { // initialization block`
	`388`	`+ x = 7;`
	`389`	`+ int x2 = 5; // block variable`
	`390`	`+ }`
	`391`	`+`
	`392`	`+ Scope() { // constructor`
	`393`	`+ x += 8;`
	`394`	`+ int x3 = 6;`
	`395`	`+ }`
	`396`	`+`
	`397`	`+ void doStuff() { // method`
	`398`	`+ int y = 0; // local variable`
	`399`	`+ for (int z = 0; z < 4; z++) { // 'for' code block`
	`400`	`+ y += z + x;`
	`401`	`+ }`
	`402`	`+ z++; // compiler error (out of scope)`
	`403`	`+ x2++; // compiler error (out of scope)`
	`404`	`+ }`
	`405`	`+`
	`406`	`+ public static void main(String[] a) {`
	`407`	`+ x++; // compiler error! 'x' is instance variable, so`
	`408`	`+ // we need an object to access it`
	`409`	`+ x2++; x3++; // compiler error! block variables scope`
	`410`	`+ // is only inside the block in which they`
	`411`	`+ // are declared`
	`412`	`+ }`
	`413`	`+}`
	`414`	`+{% endhighlight %}`
`380`	`415`
`381`	`416`
`382`	`417`

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