Question

NSMutableSet *validOperations = [@"sin", @"cos", @"sqrt", @"π", @"+/-",@"+", @"-", @"*",@"/",nil]; 

I am having an Unexpected Identifier error with this, what am I doing wrong?

Sorry, if this question seems lame, but it’s actually my first time coding with Objective-C so I don’t really know what the problem is here, so experienced programmers, please help me out!

Answer 1

Is this what you meant?

NSMutableSet *validOperations = [NSMutableSet setWithObjects: @"sin", @"cos", @"sqrt", @"π", @"+/-",@"+", @"-", @"*",@"/",nil];

In order to create an NSSet or NSMutableSet, you need to call a method. There’s no built-in syntax to create a set from a list of objects.