To get the first and last element of an array in Objective-C, you can use the firstObject and lastObject methods of the NSArray class. Here are some examples:
Example 1: Getting the first element
``objective-c
NSArray *myArray = @[@"apple", @"banana", @"orange"];
NSString *firstElement = [myArray firstObject];
NSLog(@"The first element is %@", firstElement);
Output: The first element is apple
Example 2: Getting the last element
objective-c
NSArray *myArray = @[@"apple", @"banana", @"orange"];
NSString *lastElement = [myArray lastObject];
NSLog(@"The last element is %@", lastElement);
`
Output: The last element is orange
Note that if the array is empty, both firstObject and lastObject methods will return nil`. It's always a good practice to check for that before using the elements.