Join Exercism’s Objective-C Track for access to 51 exercises with automatic analysis of your code and personal mentoring, all 100% free.
@interface HelloWorld : NSObject
- (NSString *)hello:(NSString *)name;
@end
@implementation HelloWorld
- (NSString *)hello:(NSString *)name {
if (!name) { name = @"World"; }
return [NSString stringWithFormat:@"Hello, %@!", name];
}
@end
Get better at programming through fun, rewarding coding exercises that test your understanding of concepts with Exercism.
Find the difference between the square of the sum and the sum of the squares of the first N natural numbers.
Implement a clock that handles times without dates.
Compute the prime factors of a given natural number.
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.
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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.
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