OBLECTIVE C

Objective-C is a thin layer on top of C, and moreover is a strict SUPERSETof C; it is possible to compile any C program with an Objective-C compiler, and to freely include C code within an Objective-C class.
Objective-C derives its object syntax from SMALLTALK. All of the syntax for non-object-oriented operations (including primitive variables, preprocessing, expressions, function declarations, and function calls) are identical to that of C, while the syntax for object-oriented features is an implementation of Smalltalk-style messaging.

 

for iphone users..

Registered Apple Developers can download Xcode and iOS SDK, which includes the Xcode IDE, iOS Simulator, and a suite of additional tools for developing apps for iPhone, iPad, and iPod touch.