How to create a form through the API?

for all above things I need how i can i do with api. I did not get proper documentation under http://api.jotform.com/docs/. can you please help me out.?

Please kindly note that the API documentation is a general documentation about how to handle JotForm, you will find some examples, but if you need to achieve something in specific you may need to create your own code, or hire a developer to work on it. 

For example, the points 1 and 3 will be done when you're adding questions to the form, you can set each question property: http://api.jotform.com/docs/#put-form-id-questions 

The point 2 will only require to get the submission's data, once you have the array of information you can format it as you want with your own code: http://api.jotform.com/docs/#submission-id 

The 4 one will only require to change the form properties: http://api.jotform.com/docs/#post-form-id-properties 

You may also check the sample codes for each library: http://api.jotform.com/docs/#libraries 

Also, I would recommend you to kindly download the API (from the library you want to use) and inspect the functions available, this way you may know which parameters you need to pass and how the functions are called. 

If you have questions you may also reach the API team at api@jotform.com. 

Thanks.