how can i use java scanner in while loop

Question

This is what I have so far:

int question = sc.nextInt(); 

while (question!=1){

    System.out.println("Enter The Correct Number ! ");

    int question = sc.nextInt(); // This is wrong.I mean when user enters wrong number the program should ask user one more time again and again until user enters correct number.
    // Its error is : duplicate local variable

}

Answer 1

you are declaring int question outside the loop and then again inside the loop.

remove the int declaration inside the loop.

In Java the scope of a variable is dependent on which clause it is declare in. If you declare a variable INSIDE a try or a while or many other clauses, that variable is then local to that clause.