Question mark in the middle of a url variable?

Question

If I have a variable to pass through a url and it has a question mark in it, do I just need to escape the question mark? If not how can I make sure it passes through like it

Answer 1

According to my experience of trying to make a JavaScript search engine that links to Google, just replace the question marks with %3F. A url reads the first two characters on the right of a % as hexadecimal format.