Scope

public class Test { // illustrate scope


  public static void main(String args[]) {
    // x = 100; // not allowed - x not in scope
    int x; // scope of x starts here
    x = 5; // ok
    System.out.println(x); // 5
    if (true) {
      int y = 7; // y scope starts here
    } // ends here
// y=9; not allowed - y out of scope
  }

}