Objective-C
Objective-C
About Objective-CPractice

Want to learn and master Objective-C?

Join Exercism’s Objective-C Track for access to 51 exercises with automatic analysis of your code and personal mentoring, all 100% free.

Explore exercises

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

51 coding exercises for Objective-C on Exercism. From Two Fer to Atbash Cipher.

Get better at programming through fun, rewarding coding exercises that test your understanding of concepts with Exercism.

Two Fer

Two Fer

Create a sentence of the form "One for X, one for me.".

Leap

Leap

Determine whether a given year is a leap year.

Atbash Cipher

Atbash Cipher

Create an implementation of the atbash cipher, an ancient encryption system created in the Middle East.

See all Objective-C exercises on Exercism

Key Features of Objective-C

Objective-C

Auto Memory Management

Automatic Reference Counting (ARC) allows memory to be managed automatically.

Dynamically Typed

Flexible and easy to use.

Interop

Objective-C can work with C, C++, and Swift.

Build Apple Apps

Use all Apple frameworks and libraries to develop apps for Apple's platforms.

Object-oriented

Objective-C is an object-oriented language, inspired by Smalltalk.

Categories

Allows the addition of methods to a class without subclassing or changing the actual class.

Get mentored the Objective-C way

Every language has its own way of doing things. Objective-C is no different. Our mentors will help you learn to think like a Objective-C developer and how to write idiomatic code in Objective-C. Once you've solved an exercise, submit it to our volunteer team, and they'll give you hints, ideas, and feedback on how to make it feel more like what you'd normally see in Objective-C - they'll help you discover the things you don't know that you don't know.

Learn more about mentoring

Community-sourced Objective-C exercises

The Objective-C track on Exercism has 51 exercises to help you write better code. Discover new exercises as you progress and get engrossed in learning new concepts and improving the way you currently write.

See all Objective-C exercises
Objective-C

Get started with the Objective-C track

The best part, it’s 100% free for everyone.