stepper connections

hey, m a newbie here. Plz explain to me the connections of a nipolar and bipolar stepper motor. Also, can i directly drive a stepper from Arduino?? Plz reply. If NO,then How can i drive stepper from an arduino?

You can not drive the stepper motor directly from Arduino. It draws too much current. Arduinos pins can supply absolutely max 40mA each.

You can see an example here:

http://www.arduino.cc/en/Tutorial/StepperUnipolar

If you want to learn some more, then Grumpy Mike has a really good introduction to driving all kinds of motors with Arduino:

http://www.thebox.myzen.co.uk/Workshop/Motors_1.html