try catch statement and scanner variable

[jwl]

How do you access a scanner variable initialized inside of a try catch statement outside of it?

  try
                {
                int num = keyb.nextInt();
                }
           catch (java.util.InputMismatchException e)
                {
                  System.out.println("Invalid input");
                }
              
                if (num <= 0)

The num in the if statement can't see the keyb.nextInt value.

[Norm]

You need to define a variable at the scope level that it is used at.
You can give it a value in any nested scopes.

Define it outside of the {}s so all can see and use it.

[jwl]

How would you define

int num = keyb.nextInt();

outside of the try catch statement without prompting the user to input an integer?

[Norm]

You don't need to assign a value to a variable when you define it: int num; // define num
You can assign a value to a variable that is defined: num = 2; // assign value to num

Define num outside, assign it a value inside.