For this project, we're going to build a stopwatch. A stopwatch records the amount of time that's elapsed between pressing a start button and pressing a stop button. Imagine a sprinter training for a competition. Their trainer would record their runs with a stopwatch to see how fast they're going. Or a more likely scenario for software developers, you may be doing contract work which you charge by the hour. In that case, you'll use some sort of stopwatch to capture the moments when you're working and when you're not!