Spring 2000 Computer Science 3410 - Tutorials A Truth Table is one of many ways of representing functions. The columns on the left (before the first double line) give all possible combinations of logic values the variables can have. This is a handy way of validating functions but can become cumbersome for functions with many variables because truth tables grow exponentially. For n variables, there are 2n rows. Below is a two-variable truth table excercise. Use the grey boxes in the middle to compute the function's value for each row (each combination of values). Upon clicking the grey box, the value will change from 0 to 1 and vice versa. Once you have computed the correct value, click on the space below the F to insert your answer. It can be clicked again to change the answer from 0 to 1 and vice versa. Then, click on "Check Answer". A will appear for a correct answer and a for an incorrect answer. Repeat until you get the right answer. Click "change problem" to do another problem.