The Caesar cipher is a simple but effective method of encryption. It works by shifting each letter of the alphabet a certain number of places. For example, if you shift each letter by 3 places, then the letter "A" becomes "D", the letter "B" becomes "E", and so on.
To encrypt a message using the Caesar cipher, simply shift each letter of the message by the desired number of places. For example, to encrypt the message "HELLO WORLD" with a shift of 3, you would end up with the following encrypted message: