How to use variables outside of the if statements they're defined in

I'm trying to add together the output from both if statements at the bottom (columnOutput + rowOutput), but outside both if statements I get "cannot be resolved to a variable."

Is there a way to reinstate the output values outside the if statements?

public class Main {
    public static void main(String[] args) {
        Scanner inputNum = new Scanner(System.in);  // User inputs Int
        System.out.println("Only Supporting 144 Count!");
        System.out.println("Enter Fiber Number...");

        String[] fiberColors = {"Blue", "Orange", "Green", "Brown", "Slate", "White", "Red", "Black", "Yellow", "Violet", "Rose", "Aqua"}; // 12 Fiber colors

        int numInput = inputNum.nextInt(); // Read user input for Number
         if (numInput < 145) { 
            int rowNum = (numInput - 1) % fiberColors.length;   // Row
            System.out.println("The Fiber Color is.." + fiberColors[rowNum]);
            
            int colNum = (numInput - 1) / fiberColors.length;                  // Column
            System.out.println("The Tube Color is.." + fiberColors[colNum]);
         } else {
            System.out.println("Invalid input"); // Invalid input
         }



         Scanner inputRow = new Scanner(System.in);  // User inputs String Row (Fiber Color)
         System.out.println("Enter Fiber color"); 

         List<String> fiberList = Arrays.asList(fiberColors); // Convert fiberColors to ArrayList
         System.out.println("Supported Colors: " + fiberList); //List all fiber colors
         
         String input = inputRow.next();
         if (fiberList.contains(input)) { // Check if inputRow is equal to a fiber color
            int rowConversion = fiberList.indexOf(input); // Convert from input to index of fiberList
            int rowOutput = rowConversion;
            System.out.println("output: " + rowOutput);
            } else {
               System.out.println("Invalid input");
            }
         



         Scanner inputColumn = new Scanner(System.in);  // User inputs String Column (Tube Color)
         System.out.println("Enter Tube color");

         String columnInput = inputRow.next();
         if (fiberList.contains(input)) { // Check if inputRow is equal to a fiber color
            int columnConversion = fiberList.indexOf(columnInput); // Convert from input to index of fiberList
            int columnOutput = columnConversion;
            System.out.println("output: " + columnOutput);
            } else {
               System.out.println("Invalid input");
            }

          /// Add outputs together here

    }

}