As demonstrated in a previous Try It Out exercise, when you put a breakpoint in your code, execution is halted as soon as the line with the breakpoint is about to be executed. From there, you can jump around in your code, investigate variables, and execute statements. In this exercise you saw how to step in and over code using the F10 and F11 shortcut keys. You usually use F10 to execute a line if you’re not interested in seeing the underlying code that is being called. You use F11 if you want to see the code that is being executed, as you saw how to do with the Add method.