c-cipher-encryption.py

#Python program to illustrate Caesar Cipher Technique

 # ---------------------------------------------
 #Input 
 # A String of lower case letters, called Text.
 # An Integer between 0-25 denoting the required shift.
 # ---------------------------------------------
 #Output

 # Traverse the given text one character at a time .
 # For each character, transform the given character as per the rule, depending on whether we’re encrypting or decrypting the text.
 # Return the new string generated.
 # ---------------------------------------------


def encrypt(text,s):
     result = ""

     # traverse text
     for i in range(len(text)):
         char = text[i]

         # Encrypt uppercase characters
         if (char.isupper()):
             result += chr((ord(char) + s-65) % 26 + 65)

         # Encrypt lowercase characters
         else:
             result += chr((ord(char) + s - 97) % 26 + 97)

     return result

 #check the above function
text = input("Enter Input :" )
s = 4
print ("Text  : " + text)
print ("Shift : " + str(s))
print ("Cipher: " + encrypt(text,s))