What code do i need to learn for ipad and iphone app?

I was just wondering on what i need to know to makei phone app.
I did a bit of research and seen i need to learn c++ and another page that says i need to learn objective C. Can anybody tell me the if its the same? If not what's the difference.

Both Objective-C and C++ have C as their basis.

Both Objective-C and C++ add object-oriented programming to C but in different ways.

For programming iOS, you'll want to learn Objective-C (which includes C). C++ could possibly be used in addition to C & Objective-C but C++ is not necessary usually for programming Apple equipment. Objective-C is pretty much required to program Apple equipment.