two exercises

exercises/032_unreachable.zig

@@ -31,10 +31,14 @@ pub fn main() void {
             },
             2 => {
                 current_value -= 1;
+            }, 
+            else => {
+            unreachable;
             },
-            3 => {
+              3 => {
                 current_value *= current_value;
             },
+        
         }
 
         std.debug.print("{} ", .{current_value});