What is objective C Language?

Objective c language properties and basic description about objective c language.

Objective-C

• Strict superset of C
• Mix C with ObjC Or even C++ with ObjC (usually referred to as ObjC++)
• A very simple language, but some new syntax
• Single inheritance, classes inherit from one and only one superclass
• Protocols define behavior that cross classes
• Dynamic runtime
• Loosely typed, if you’d like

Class and Instance Methods

Instance respond to instance methods
-(id)init;
-(float)height;
-(void)walk;
Classes respond to class methods
+(id)alloc;
+(id)person;
+(Person*)sharedPerson;

Message Syntax

[receiver message];
[receiver message:argument];
[receiver message:arg1 andArg: arg2]

Terminology

• Message expression - [receiver method:argument]
• Message - [receiver method:argument]
• Selector - [receiver method:argument]
• Method - The code selected by a message.