Trying to make text fields start with a 0 value-swift : <p>I have a calculator app I'm working on where I want the fields to begin upon opening the app with a zero value, then they can enter a different value if they have one.  the reason is I have it to where the calculations will handle zeros in the equations, but if they don't enter a value in the field instead of printing text like" hey enter a number" I just want it to auto populate a zero in that field that they haven't entered anything for.  Hope that makes sense.</p>
