Breadboards included with starter pack?

I got an Arduino Uno starter pack and have managed to start using the led blink programme fine, but any examples I find online have breadboards with 2 extra rows on the outside, whereas the boards that came with the pack only have the inner rows. Are the outer rows necessary for working the Arduino or are they used for something different?

Maybe a newbie question but I am only a newbie!

thanks!

David

Those outer rows are busses for power (+5 and Gnd).
You can do without them, but they do make connections to +5 / Gnd more convenient.

Some explanation and pictures here:
http://www.ladyada.net/learn/arduino/lesson3.html

Google around for others...

Nice one cheers!