prog.js:5:1 ReferenceError: x is not defined
Stack:
  @prog.js:5:1

Main.java:7: error: cannot find symbol
    System.out.println(x);
                       ^
  symbol:   variable x
  location: class Main
1 error

prog.cpp: In function ‘int main()’:
    prog.cpp:9:13: error: ‘x’ was not declared in this scope
        9 |     cout << x;
          |             ^