@Tyler643, the symbol represents an XOR gate. Meaning "Exclusive OR". So for the output to be 1 or "on", only ONE input can be a 1. If neither or both are 1 then the output is 0, or "off". There are some nice videos online explaining logic gates more.

@Tyler643, there's an app for Android called Circuit Scramble that is like, a puzzle game involving logic gates like this. If you're interested in this you should check it out.

XOR?