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I'm not sure I understand what you are asking.
You can give just about any name you want to the parameters received by a method:
private String encrypt(String theWordToWorkOn, int...

Do you see how the algorithm works? The original input is encrypted and then decrypted back to the original input.

Look at the output.
Do you see any relationship between the output of these two lines of code and the input to the program?

What did you want the Caesar class to do for you?
Did it have a method that would do that?

Yes, that can work for this specific very small example.
When your programs get larger and when there...

The fix to your program is to add a call to nextLine() to read the empty line BEFORE you ask for the word.

Your problem is with the way the Scanner class works. The nextInt() method reads the next word as a number from the input and leaves the endline from Enter in Scanner's buffer. The nextLine() call...

Why isn't there a word to encode entered? Your posted console contents does not show a word being entered.
If nothing goes in, then I would think that nothing would come out.
Try it and enter a...

Can you explain? Show what the code does print out and also show what you think it should output.