Running a code with preset values or asking for values

I am writing a code which has some variables at the beginning. I would like the user to have two options when the code is ran: click (or select through another way) a default mode (so the program then runs automatically with pre-set values) and a specified values mode (the program asks for values for some of the variables).

Is there any easy way of doing this? (not using any extra packages)

Answer 1

[Joseph Cheng]

You can use the two functions questdlg() and inputdlg() to ask the questions and for them to input the values. The examples in the documentation should be enough describe the usages.