phone_number = input("Please type in your UK Landline Phone Number for validation\n(charcters must be from 0-9 and must have a space):") phone_number_len = int(len(phone_number)) phone_number_c1 = "" phone_number_c2 = "" phone_number_c3 = "" allowed_characters = (0,1,2,3,4,5,6,7,8,9) if phone_number[0] == "0": phone_number_c1 = "pass" else: print("ERROR: Phone number does not start with a zero.") if phone_number_c1 == "pass": if phone_number_len < 11 or phone_number_len > 13: print("ERROR: Phone number length is incorrect.") else: phone_number_c2 = "pass" if phone_number_c2 == "pass": valid_chars = 0 for x in range(phone_number_len): for y in range(len(allowed_characters)): if phone_number[x] == allowed_characters[y]: valid_chars += 1 else: print("ERROR: You have not entered valid characters.")
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