How the function can be defined in Objective-C?

A function is a group of statements that together perform a task. Every Objective-C program has one C function, which is main(), and all of the most trivial programs can define additional functions. You can divide up your code into separate functions.

How is Objective-C compiled?

Objective-C compiles into machine code. Remember that the language (Objective-C, C, C++) only defines the rules to correctly write code. The compiler checks to see if your code is correct and compiles it, i.e., translates it into executable code. Also, don’t confuse Objective-C language, and the Objective-C runtime.

How do you declare method in Objective-C?

An Objective-C method declaration includes the parameters as part of its name, using colons, like this: – (void)someMethodWithValue:(SomeType)value; As with the return type, the parameter type is specified in parentheses, just like a standard C type-cast.

Does Objective-C compile to machine code?

Yes, Objective-C compiles to machine code.

What is a property in Objective-C?

Objective-C properties offer a way to define the information that a class is intended to encapsulate. As you saw in Properties Control Access to an Object’s Values, property declarations are included in the interface for a class, like this: @interface XYZPerson : NSObject.

Is Objective-C object-oriented?

Objective-C is the primary programming language you use when writing software for OS X and iOS. It’s a superset of the C programming language and provides object-oriented capabilities and a dynamic runtime.

What is Objective-C runtime?

The Objective-C runtime is a runtime library that provides support for the dynamic properties of the Objective-C language, and as such is linked to by all Objective-C apps. Objective-C runtime library support functions are implemented in the shared library found at /usr/lib/libobjc.

Is Objective-C compiled or interpreted?

Objective-C is certainly a compiled language.

What is instance variable Objective-C?

An instance variable is a variable that exists and holds its value for the life of the object. The memory used for instance variables is allocated when the object is first created (through alloc), and freed when the object is deallocated.