Ceaser | Ceaser page and JS -

I've got a piece of code that creates a string in an encoded format and I'm trying to check whether the original message has a capital letter and if so change the number character into a capital letter, here is my current code:

I found online a working script to try on ceaser cypher, I modified it a bit to be able to decrypt and it's working well for both sides except one detail:

whenever it's a special character (non alphabetical) such as: , . ! () ect... it encrypts it like a letter (fine and normal I guess) but once decrypted, these special characters are transformed into a letter, of course it's still kinda readable, but not fully decrypted as it should.

I'm pretty new to encryption, I've looked arround a bit but don't seem to find any solutions so any insight will be helpful

here is the script:

I was given an assignment to create a Java program in Jgrasp that encrypts and then decrypts a message using ceaser's cipher. Our teacher gave us a shell and examples all of which I used to create the code. The problem is that the code compiles fine, but when trying to run it, I get a Sting Index Error. I somewhat understand what the error means, but I'm at a lost as to how to resolve it. If someone could explain to me what is causing the error and how to resolve it, it would be greatly appreciated!

UPDATE: Thanks to Spectric for pointing out the error in my for loops! The problem I have now is that I can't seem to get the message to output in all caps even though I used String MESSAGE = message.toUpperCase(); . Also I added output lines and while the encrypted message displays the decrypted message is just blank. Lastly when spaces are added to the message I get an error, how do you account for non character inputs when doing the encryption/decryption? I'm assuming it is some form of if statement, but I've been unable to crack it. Appreciate the help!

CODE:

I'm creating a program to categorize arguments that I give it in the form of a list. Right now, an "option" is an argument that is immediately after an argument that starts with -. A "switch" is an argument that starts with --. Here's my whole program:

Here is the HTML

In matlab i'm coding a Ceaser Cipher, but the space shows up as a 'y' character. How can I replace that with a space

I recently started C++ and I wanted to create a simple ceaser cipher function that could be called on, however because I copied the coding structure form my python program I seem to be getting 4 errors and 2 warnings. The mode bit is a bool where true is to encrypt and false is to decrypt (it worked on python so hey) :).

First one on the line of me creating the function where "int" is, its saying "identifier "in" undefined"

Second one in the same line saying "expected a ')'"

Third one is after the 3 if statements, saying "identifier "CharPos" undefined" even though it is defined

And Forth on the same line saying "'CharPos': undeclared identifier"

sorry for my poor English. I' am new in python. I have the code below that seem not working. I cannot figure out why :

I am trying to make a simple Ceaser cipher and have it mostly working the way I want. Except, I want to only shift the letters in the message that are uppercase and keep the lowercase letters the same. For example, if the message is "HeLLo" the program should only shift "H LL" and keep "e o" the same. As shown below.

Current output: