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PRODIGY_CS_01
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PRODIGY_CS_01
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'''
Task-01
Implement Caesar Cipher
Create a Python program that can encrypt and decrypt text using the Caesar Cipher algorithm.
Allow users to input a message and a shift value to perform encryption and decryption.
'''
#Encryption Function
def Encryption(message,shift):
result = ""
# perform the iteratation on the given mesasge
for i in range(len(message)):
char = message[i]
# Check when there is space in message, and then add it.
if char==" ":
result+=" "
# check if a character is uppercase then encrypt it according to uppercase character
elif (char.isupper()):
result += chr((ord(char) + shift-65) % 26 + 65)
# check if a character is lowercase then encrypt it according to lowercase character
else:
result += chr((ord(char) + shift-97) % 26 + 97)
return result
#Decryption Function
def Decryption(message,shift):
return Encryption(message, -shift)
#main function
message = input("Enter the message to encrypt: ")
shift = int(input("Enter the shift value: "))
encrypted_message = Encryption(message, shift)
decrypted_message = Decryption(encrypted_message, shift)
print("\nEncrypted message:", encrypted_message)
print("\nDecrypted message:", decrypted_message)
print("\n\n")