Programmers Blog (Java)

Program:- Variable Scope

class Scope
{
    public void ScopeTest()
    {
      int x;            // known to all code withing this function
      x=10;
      if (x==10)
      {                  //start new scope
          int y = 20 ;   //known only to this block
          x = y * 2 ;
      }
      y=100;             //Error!! y not known here

      //x is still known here. 
      System.out.println("x is " + x); // No problem here

  //Hence the complier complains if I refernce a variable out of scope
}
}