convert string to float in objective-C

Question

how do I convert string to float in objective-C?

I am trying to multiply a couple of strings I am getting back from JSON:

float subTotal = [[[[purchaseOrderItemsJSON objectAtIndex:i] objectAtIndex:j] objectForKey:@"Price"] floatValue];

NSLog(@"%@",subTotal);

This gives me: (null) in the console. I know that there is a valid string coming out of that array because I am already using it to display it's value in a label.

Answer 1

your_float = [your_string floatValue];

EDIT:

try this:

  NSLog(@"float value is: %f", your_float);

Answer 2

Have you tried Google? Search for "objective-c string to float" results in first entry:

NSString Class Reference - floatValue