Preview lessons, content and tests

Computer Science & Programming solved. All in one platform.

1. To trial the platform and take tests, please take a few seconds to SIGN UP and SET UP FREE.

2. Searching for something specific? See our text overview of all tests. Scroll right for levels, and lists.

3. Student and Teacher User Guides |  Schemes of Work |   Real Teacher use Videos |

Join 36000+ teachers and students using TTIO.

Trace Tables

Understanding how programs work and how to use a trace table.

Trace tables are tables that consist of columns. Each column can represent a variable, a condition, or an output. Not every variable, condition or output in an algorithm needs a column in a trace table. The purpose of the table is that we can run through an algorithm and simulate what a computer would do if the program were to execute. We complete the table to show how the variables change, what the conditions would resolve to, and/or what outputs would be displayed.

Programming and Trace Table Examples

Presentation #2 - VB.Net Example

Why are they used?

There are two main reasons that trace tables are used.

The first is to determine what an algorithm does by running through it to see what happens as the algorithm runs. The second is to test the logic of an algorithm if there are errors that are not easily spotted.