Use of iPad, if i already have an iPhone?

I just want to know, if i have a iPhone, what's the use of buying an iPad. I saw most of my colleagues have both iPhone and iPad.

I still use a 1st generation ipad for book reading… Great for that.

Its much bigger, better, has more room and its kind of like a laptop. I have one and its AMAZING and its not even that expensive, sometimes its even cheaper than the iphone…

Get the iPad too! You'll never regret it its awesome and so much better than an iphone! Although its quite the same, the ipad is still a good thing to have

IPad is more of a gimmick iPhone without calling feature and without sms and with a big screen for reading, woching movies and playing games. Its an Over rated product. You will be impressed with the build quality but its a bulk to carry around. It is better for professional use than personal.
Check if it suits your needs in any way.

The iPad is like the bigger version of the iPod Touch. I mean you can surf on the web and do thorough research with a 1 pound tablet instead of just zooming in on your iPhone. I'd say an iPad would be a better advantage than the iPhone itself lol

The two devices can sync together, for example you may make a purchase on one, and it will appear on another.
You can start working on a file on one and finish it on the other.

Basically, an iPhone and iPad work together brilliantly