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JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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Based on what you have mentioned it seems that you want to have some fields shown / hidden based on specific conditions.
To do that I would suggest taking a look at the following guide: How to show or hide a field in the form based on the other field input or selection
It will show you how to set up the form in such manner, but of course if you are having any additional questions or any issues along the way, please do let us know.