Your original post includes a link to a thread, How to ask good questions (and get good answers). It is very well worth reading.
Included in the advice provided in that thread is the following:
If you have a question about a particular exercise, course, or resource; include a link .
Many users read the posts of those who are asking for help. If they cannot find the pertinent exercise, it is difficult for them to offer that help.
The question included in the title of your post is the following:
How do i create a variable call Ceaser?
Is that consistent with the instructions in the exercise?
It would be useful for other users to see the code that you have attempted to submit thus far. If you do post your code, be sure to format it as described in the thread about how to ask good questions.