The given code below prints out the rows of a truth table. Block $1$ prints out the rows of a truth table with two variables. Block $2$ prints out the rows of a truth table with three variables.

Run the code by clicking the orange Run program button in the Develop mode and see what the output looks like.

Next, see if you can create your own code in Block $3$ that will create a truth table with four variables: p$,$ q$,$ r$,$ and w$.$ To test the output of your code, submit your code by clicking the orange Submit for grading button in the Submit mode. The second test case will indicate if your code works correctly.