Caesar Cipher Encoder

caesar_converter.py

def convert_to_caesar():
    sentence = input('Enter your sentence to be encrypted:').upper().replace('.', 'X').replace(' ', '')
    shift = int(input('Enter the shift value (integers only):'))
    
    
    encrypt = ""
    # basic algorithm
    # c = (x + n) % 26
    # Where c is the encoded character, x is the actual character, and n is the number of positions we want to shift the character x by. We’re taking mod with 26 because there are 26 letters in the English alphabet.
    
    for a in sentence:
        a_unicode = ord(a)
        
        a_index = ord(a) - ord("A")
        
        # shift the character
        new_index = (a_index + shift) % 26
        
        # convert to new character
        new_unicode = new_index + ord('A')
        
        new_char = chr(new_unicode)
        
        encrypt = encrypt + new_char
    
    
    print(encrypt)
    
    return encrypt
    

convert_to_caesar()