Scope Example

 		
  int var1; // Visible in ....  	
	  int var3 = 30;  		    	
	  var1 = 10;    		
  if(var1 == 10)  		 
  { // begin new code block  		
     int var3 = 12;  // what is wrong here?   	
	   int var2 = 20; // Visible in...    		
   System.out.println("var1 and var2 : "+ var1 +""+ var2);  
		   }  		    		  
 var2 = 100; // Why is there an error here?  	
 System.out.println("var1 and var2 : "+ var1 +""+ var2);  	
 System.out.println("var1 is " + var1);  
 System.out.println("var3 is " + var3);