Encrypt- Decrypt

 



direction = input("Type 'encode' to encrypt, type 'decode' to decrypt:\n").lower()
text = input("Type your message:\n").lower()
shift = int(input("Type the shift number:\n"))

#TODO-1: Create a function called 'encrypt' that takes the 'text' and 'shift' as inputs.

#TODO-2: Inside the 'encrypt' function, shift each letter of the 'text' forwards in the alphabet by the shift amount and print the encrypted text.
#e.g.
#plain_text = "hello"
#shift = 5
#cipher_text = "mjqqt"
#print output: "The encoded text is mjqqt"

##HINT: How do you get the index of an item in a list:
#https://stackoverflow.com/questions/176918/finding-the-index-of-an-item-in-a-list

##🐛Bug alert: What happens if you try to encode the word 'civilization'?🐛

#TODO-3: Call the encrypt function and pass in the user inputs. You should be able to test the code and encrypt a message.

def encrypt(text,shift):
res=""
shift=shift%26
for i in range (len(text)):
if ord(text[i])+shift<=ord('z'):
b=ord(text[i])+shift
print(text[i])
res+=chr(b)
else:
b=ord('a')+ord(text[i])+shift-ord('z')-1
print(text[i])
res+=chr(b)
return res

encrypted=encrypt(text,shift)


def decrypt(text,shift):
res=""
shift=shift%26
for i in range (len(text)):
if ord(text[i])-shift>=ord('a'):
b=ord(text[i])-shift
print(text[i])
res+=chr(b)
else:
b=ord('z')+ord(text[i])-shift-ord('a')+1
print(text[i])
res+=chr(b)
return res


print(encrypt(text,shift))
print(decrypt(encrypted,shift))

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