// SomeClass.h

#import <Foundation/Foundation.h>

@interface SomeClass : NSObject {
	int mynumber;
	NSString *mystring;
}

@property(readwrite/readonly, assign/retain/copy, nonatomic) int mynumber;
@property(readwrite/readonly, assign/retain/copy, nonatomic) NSString* mystring;

@end

// SomeClass.m

#import "SomeClass.h"
@implementation SomeClass

@synthesize mynumber, mystring;

@end

Objective C - Properties

Objective C