Caesar cipher Python

key = int(input('Scrivte una chiave: '))
text = input('Scrivete qualcosa: ')


def encrypt_c():
    encrypted_text = ''
    for symbol in text:
        encrypted_text += chr(ord(symbol)+key)

    print(encrypted_text)


def decrypt_c():
    decrypted_text = ''
    for symbol in text:
        decrypted_text += chr(ord(symbol) - key)

    print(decrypted_text)