[Jimmy Cao]

Here's what i use various languages with.

C = robotics. It's hardly ever used anywhere else.
C++ = for fun. Since my school dosen't have a programming class, i dont use it at school. I just use it to make random stuff at home.
Java = website programming, usually. Java is often used online.

There are also various other languages out there. Many can do the same thing. As far as robotics is concerned, knowing C is enough.