XD offers no logic or controls, so any prototype would have to be pre-built flows, so you could only demonstrate specific inputs. For example, you would have to show 2+3 =5. If you wanted to show 3+2=5, then you have to ALSO build that flow. So if you just want to demonstrate one or two examples, XD will work; otherwise, you will need to use something else. Mind you, you need to ask yourself is that level of fidelity is needed?
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