Introduction to Objective-C

Objective-C is a general-purpose, object-oriented programming language that adds Smalltalk-style messaging to C.

Key Features:

• Built on top of C
• Dynamic runtime
• Message passing
• Used for macOS/iOS development
• Foundation framework

Hello World:

#import <Foundation/Foundation.h>

int main() {
  @autoreleasepool {
    NSLog(@"Hello, Objective-C!");
  }
  return 0;
}

Variables and Objects:

NSString *name = @"Objective-C";
NSNumber *age = @40;
NSArray *numbers = @[@1, @2, @3];