done

Author: smriti1313

Caesar-Cipher/caesar_cipher.py

@@ -0,0 +1,30 @@
+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']
+
+def caesar(text1, shift1, direction1):
+	end_text = ''
+	if direction=='decode':
+		shift1 *= -1
+
+	for char in text1:
+		if char in alphabet:
+			position = alphabet.index(char)
+			new_position = position + shift1
+			end_text += alphabet[new_position]
+		else:
+			end_text += char
+	print(f'The {direction1}d text is: {end_text}.')
+
+
+should_continue = True
+while should_continue:
+	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
+
+	caesar(text, shift, direction)
+	choice=input("Type 'yes' to continue otherwise type 'no'.\n")
+	if choice == 'no':
+		should_continue=False