Notes

#this code for ENcrypt and Decrypt any plain text you entered using Ceaser Cipher
def Encrypt(pText): #encrypt function
cText = ""
for i in range(len(pText)):
ch = pText[i]
#now we will go for odd
if (i % 2 != 0):
cText += chr((ord(ch) - 1 - 97) % 26 + 97)
#now we will go for even
else:
cText += chr((ord(ch) + 5 - 97) % 26 + 97)
return cText


def Decrypt(cText): #decrypt function
pText = ""
for i in range(len(cText)):
ch = cText[i]
#now we will go for odd
if (i % 2 != 0 ):
pText += chr((ord(ch) + 1 - 97) % 26 + 97)
#now we will go for even
else:
pText += chr((ord(ch) - 5 - 97) % 26 + 97)
return pText

"""
End of Encrypt/Decrypt functions
"""

#here we will start while loop to keep taking from user until he/she enter q
while(1) {
UserChoose = input("Enter your choose e --> Encrypt, d --> Decrypt, q --> quit : ")
#here want to encrypt
if (UserChoose == "e"):
{
UserText = input("Please choose your PlainText you want to encrypt: ")
print("Cipher Text is : ",Encrypt(UserText))
print("Your Plain Text was : ",Decrypt(Encrypt(UserInputText))) }

else:
#here want to decrypt
if (UserChoose == "d"):
{
UserEText = input("Please choose your encrypted text you want to decrypt: ")
print("Plain Text is : ",Decrypt(UserEText))
print("Your Cipher Text was : ",Encrypt(Decrypt(UserEText))) }
else:
#here he/she want to exit
if(UserChoose == "q")
{print("Thank you for using our Tool! See you")
break )

} #end of while