Objective-C

4 Mentors

Our mentors are friendly, experienced Objective-C developers who will help teach you new techniques and tricks.

1,000 Students

Join hundreds of students who have enjoyed learning and improving their skills by taking this track.

51 Exercises

Hundreds of hours have gone into making these exercises fun, useful, and challenging to help you enjoy learning.

About Objective-C

@interface HelloWorld : NSObject
- (NSString *)hello:(NSString *)name;
@end

@implementation HelloWorld
- (NSString *)hello:(NSString *)name {
  if (!name) { name = @"World"; }
  return [NSString stringWithFormat:@"Hello, %@!", name];
}
@end

Objective-C is a thin layer on top of C, and is a "strict superset" of C, meaning that it is possible to compile any C program with an Objective-C compiler, and to freely include C language 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, pre-processing, expressions, function declarations, and function calls) is identical to that of C, while the syntax for object-oriented features is an implementation of Smalltalk-style messaging.

You can find more information about the language and its history here.

Join the Objective-C track

Exercism is a great website

The reviews are incredibly helpful because they help me see things that I missed, learn about new ways and sometimes interesting discussions that can add a fun twist to maybe a simple problem.

Bud Chirica, Scotland

Relaxed. Encouraging. Supportive.

Meet the Objective-C Track mentors

Once you join the Objective-C language track, you will receive support and feedback from our team of mentors. Here are the bios of a few of the mentors of this track.