Transferring data from one web-page to another web-page


Hello, I am pretty new to programming so I apologize if this comes off as a very naive or foolish question.

I am trying to figure out how to send information (numerical) from one web page to another web page.

1st Web-Page
There is a function within the 1st web-page.

If it runs successfully,numerical data is generated.

2nd Web-Page
There is a function within the 2nd web-page.

The code sample originally has a button on that page that you use to submit the numerical data which would then trigger a function.

The triggering of that function is what I am focusing on ,that is, after sending the numerical data to it, the function will be triggered or activated.

The intended result is having the function be triggered or activate automatically without the user having to click a button and or submit the numerical data through clicking a button.

How exactly do I do this?

The following is a screenshot of the development area: