Else Statement Issue

Ceasar Cipher

import pyperclip

this string to be encrypted/decrypted

message = "this is my secret message"

the encryption/decryption key

key = 13

Tells the program to encrypt or decrypt string

mode = "Encrypt"

letters that can be encrypted

LETTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"

stores the encrypted/decrypted form of the message

translated = ''

capitalize the string in message

message = message.upper()

run the encryption/decryption code on each symbol in the message string

for symbol in message: if symbol in LETTERS: # get the encrypted (or decrypted) number for this symbol num = LETTERS.find(symbol) # get the number of the symbol if mode == 'encrypt': num = num + key elif mode == 'decrypt': num = num - key

    # handle the wrap-around if num is larger than the length of
    # LETTERS or less than 0
    if num >= len(LETTERS):
        num = num - len(LETTERS)
    elif num < 0:
        num = num + len(LETTERS)

    # add encrypted/decrypted number's symbol at the end of translated
    translated = translated + LETTERS[num]

    else:
         translated = translated + symbol

print the encrypted/decrypted string to the screen

print(translated)

copy the encrypted/decrypted string to the clipboard

pyperclip.copy(translated)