Difference between _property and self.property

Question

I\'m slightly confused as to the proper conventions when dealing with properties. I\'ll illustrate my question through an example. So from the example below I know that func

Answer 1

When you write out @synthesize loan = _loan; it is basically shorthand to say that what you are synthesizing is = to a private member it would be similar to the verbose way of coding it below:

//ClassA.h
@interface ClassA: UIViewController {
    double _loan;
}

@property double loan;
@end

//ClassA.m
@implementation ClassA
@synthesize loan = _loan;

It is good practice to write it out this way so you can clearly have a '_' to signify your private members within your class code but when exposing this as a property to other classes that shouldn't be shown.