I'm trying to add a payment calculator to my app to help my chances of getting approved. I'm getting syntax errors in my .m file and i'm not really sure what I'm doing wrong. I was hoping someone a little more experienced than me could look at what I'm doing and tell me where I'm screwing up. Any help would be great. // // ViewController.h // PaymentCalculator #import <UIKit/UIKit.h> @interface ViewController : UIViewController{ IBOutlet UITextField *amountFin; IBOutlet UITextField *loanTerm; IBOutlet UITextField *rate; IBOutlet UILabel *payment; } -(IBAction)submit; -(IBAction)clear; @end // // ViewController.m // PaymentCalculator #import "ViewController.h" @implementation ViewController -(IBAction) submit{ float p = ([amountFin.text floatValue]); int x = ([loanTerm.text intValue]); float r = ([rate.text floatValue]); float a; a =(p)(r(1+r)^x)/(1+r)^x)-1)); <<Error payment.text [[NSString alloc]initWithFormat: @"%a.f", a]; <<Error } -(IBAction) clear{ amountFin.text = @""; loanTerm.text = @""; rate.text = @""; payment.text = @"; } - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end

Your variables need to be synthesized. And properties added. Look up @synthesize and @property in relation to ios programming.

Nad is correct; Those variables won't be recognized until you synthesize them... Gloss over the way they did this one: http://easyiphonedevelopment.blogspot.com/2010/07/easy-loan-calculator-part-1.html http://easyiphonedevelopment.blogspot.com/2010/07/implementing-easy-loan-calculator.html Cheers! -- Smug

Actually, he doesn't have any properties declared, so they don't need to be synthesized. Wouldn't cause the syntax error anyway. Instead, change your floats to CGFloats, and your offending lines to: a =(p)*(r*(1+r)^x)/(1+r)^x)-1)); payment.text = [[NSString alloc]initWithFormat: @"%f", a]; Hopefully that works. I'm doing this on my phone, so I may be missing something.

Thank you very much guys. That is going to help me a lot.