Created caesar_cipher.py

Python/caesar_cipher.py

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+print('''
+
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+  ▀▄▄▄▄▄▀▄▄▀▄▄▀▄▄▄▄▄▀▄▄▄▄▄▀▄▄▀▄▄▀▄▄▀▄▄▀▀▀▄▄▄▄▄▀▄▄▄▀▄▄▄▀▀▀▄▀▄▀▄▄▄▄▄▀▄▄▀▄▄▀
+
+      ''')
+
+
+alphabet = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z']
+end_task="Yes"
+while end_task=="Yes":
+  direction = input("Type 'encode' to encrypt, type 'decode' to decrypt:\n")
+  text = input("Type your message:\n").lower()
+  shift = int(input("Type the shift number:\n"))
+  shift =shift % 25
+
+  def caesar(start_text, shift_amount, cipher_direction):
+    end_text = ""
+    for letter in start_text:
+      if letter not in alphabet:
+        end_text += letter
+      else :  
+        position = alphabet.index(letter)
+        if cipher_direction == "decode":
+          shift_amount = -abs(shift_amount)
+        new_position = position + shift_amount
+        new_letter = alphabet[new_position]
+        end_text += new_letter
+    print(f"The {direction}d text is {end_text}")
+
+  caesar(start_text=text, shift_amount=shift, cipher_direction=direction)
+  end_task=input("Type 'Yes' to go again ,otherwise type 'No'\n")
+  if end_task=="No":
+    break
+print("Thanks for using 'CAESAR CIPHER' ,Have a nice day!")