Given this main method:

Trace the code using the long form. To help you get started, here’s the trace setup.

1. 

The third column is for the switch expression’s controlling expression. When evaluating a switch expression, under line# provide both the line where the expression is evaluated and the line where that value is assigned, like this:

1 456 WNH 2 3 6 7 8 10 11 12 13 14 15 16 public static void main(String[] args) ( int i; String debug for (1-3; 1>0; i--) { = debug switch (1+1) { case 1 -> "one"; case 2, 3 -> "two or three"; case 4 -> "four": default>"default": }; // end switch System.out.println (debug); } // end for // end main