This is a small question and probably a simple answer, but I haven’t had luck searching online for it (probably because the words are too general and common).
For the tip calculator app from the 4-part free course, I understand that the dollar sign ($) is needed in the textfield, for the app to calculate currency.
I have the app starting with the dollar sign in the textfield, so that’s fine; the only problem is that the delete button on the UI keyboard can be used to delete the dollar sign, and then the app won’t do any calculations at all.
So I’d like to make the dollar sign permanent (i.e. not able to be deleted). Anyone know a good way to do this?