1 00:00:00,390 --> 00:00:02,940 Now let's move on to hint number 10. 2 00:00:03,660 --> 00:00:06,750 It says that if the game has not ended ask the user 3 00:00:06,750 --> 00:00:09,630 if they want to draw another card. If yes 4 00:00:09,660 --> 00:00:13,470 then use the deal card function to add another card to the user's card list. 5 00:00:13,830 --> 00:00:15,840 If no, then the game has again 6 00:00:15,900 --> 00:00:19,680 ended. Over here in the if statement 7 00:00:19,740 --> 00:00:24,540 we can add an else because if the game hasn't ended, as in 8 00:00:24,570 --> 00:00:27,840 they haven't gone over 21 or nobody's got a Blackjack, 9 00:00:28,140 --> 00:00:31,920 then we're going to ask the user if they want to get another card. 10 00:00:32,340 --> 00:00:34,410 I'm going to use a input 11 00:00:35,370 --> 00:00:38,700 and I'm going to ask the user to type 'y' to get another card, 12 00:00:39,120 --> 00:00:41,340 otherwise type 'n' to pass. 13 00:00:42,000 --> 00:00:45,360 And I'm going to save this input inside a variable, which I'll 14 00:00:45,410 --> 00:00:47,900 call user_should_deal. 15 00:00:49,340 --> 00:00:54,340 Now we can check to see if this variable is equal to 'y'. Well in that case, 16 00:00:57,410 --> 00:00:59,810 we're going to add another card to 17 00:00:59,810 --> 00:01:03,980 the user's card list by doing the same thing that we did in the beginning 18 00:01:04,069 --> 00:01:07,550 where we dealt two cards to each player by saying 19 00:01:07,580 --> 00:01:12,380 user_cards.append and inside the parentheses 20 00:01:12,400 --> 00:01:16,790 the thing that we want to append is the output from deal_card. 21 00:01:18,080 --> 00:01:22,730 So just a quick check to make sure you've got all the parentheses there and then 22 00:01:22,760 --> 00:01:26,990 we're ready to address the else. If they didn't type 'y', 23 00:01:27,140 --> 00:01:30,920 then that means they don't want another card. Well, then in this case, 24 00:01:30,950 --> 00:01:32,630 the game has again ended. 25 00:01:32,780 --> 00:01:35,960 So we can say is_game_over equals true. 26 00:01:38,210 --> 00:01:39,740 Let's test this out as well. 27 00:01:40,340 --> 00:01:44,600 We got 7 and 11 with the current score of 18. 28 00:01:45,140 --> 00:01:48,500 If we type 'y' hopefully we'll get another card. 29 00:01:49,520 --> 00:01:52,460 And we did see that prompt and we saw something happen, 30 00:01:52,820 --> 00:01:57,530 but our program then promptly ended. Let's take a look at the next step. 31 00:01:57,650 --> 00:02:00,110 How can we get our game to repeat itself? 32 00:02:00,830 --> 00:02:04,580 So hint number 11 tells us that the score will need to be rechecked with 33 00:02:04,580 --> 00:02:05,990 every new card drawn 34 00:02:06,470 --> 00:02:10,940 and the checks in hint 9 needs to be repeated until the game ends. 35 00:02:11,510 --> 00:02:15,890 Notice how we've got this flag, is_game_over, which is set to true 36 00:02:16,160 --> 00:02:19,880 whenever the game ends. It starts off being false 37 00:02:20,240 --> 00:02:23,900 and what this means is we can actually create a while loop 38 00:02:24,260 --> 00:02:27,260 which basically keeps on calculating the user_score 39 00:02:27,350 --> 00:02:30,590 and the computer_score, makes all of these checks 40 00:02:30,800 --> 00:02:32,390 which are in hint 9, 41 00:02:32,780 --> 00:02:36,050 and then repeats itself until the game ends. 42 00:02:36,860 --> 00:02:40,370 Let's go ahead and do that. After all the initial setup, 43 00:02:40,520 --> 00:02:45,320 we're going to create a while loop and the while loop is going to be active 44 00:02:45,500 --> 00:02:48,560 until the game is over. So we can say 45 00:02:48,560 --> 00:02:50,900 while not is_game_over, 46 00:02:51,770 --> 00:02:55,460 then go ahead and carry out all of these instructions. 47 00:02:55,760 --> 00:02:59,060 So calculate the user_score, calculate the computer_score, 48 00:02:59,380 --> 00:03:03,670 check that nobody's gone over 21 and nobody's gotten a Blackjack. 49 00:03:04,090 --> 00:03:08,190 And if the user wants more cards than they should, if they don't then the 50 00:03:08,190 --> 00:03:12,040 the game is over. So let's run this and try it again. 51 00:03:14,160 --> 00:03:18,270 Our cards are 10 and 10 which probably means we shouldn't get another card 52 00:03:18,270 --> 00:03:22,320 cause we're already so close to 21, but I'm going to be daring and press 53 00:03:22,320 --> 00:03:26,730 'y' anyways. And it tells us that our cords are now 10, 54 00:03:26,760 --> 00:03:28,260 10 plus two. 55 00:03:28,590 --> 00:03:32,490 So we got an extra card and that takes up our score to 22. 56 00:03:33,030 --> 00:03:34,620 That worked perfectly. 57 00:03:35,310 --> 00:03:38,820 So now let's go back and tackle the next part. Hint 58 00:03:38,820 --> 00:03:42,960 number 12 says once the user is done, it's time to let the computer play. 59 00:03:43,410 --> 00:03:48,270 The computer should keep drawing cards as long as it has a score less than 17. 60 00:03:49,200 --> 00:03:53,940 So the while loop is responsible for dealing with when the user wants to keep 61 00:03:53,940 --> 00:03:56,880 drawing cards. But once that's done, 62 00:03:56,970 --> 00:03:59,280 then we can tackle hint number 12, 63 00:03:59,700 --> 00:04:04,110 which is how does the computer actually play? What is its strategy? 64 00:04:04,680 --> 00:04:08,010 Well, we know that the computer has to keep drawing cards 65 00:04:08,520 --> 00:04:13,020 as long as it has a score of less than 17. But, of course, 66 00:04:13,260 --> 00:04:17,370 0 which represents a Blackjack is also less than 17, 67 00:04:17,670 --> 00:04:21,420 but we don't want it to draw a card if it has a Blackjack. 68 00:04:22,230 --> 00:04:27,230 We can represent this logic using a while loop; while the computer_score is not 69 00:04:29,460 --> 00:04:34,460 equal to zero and the computer_score is less than 17, 70 00:04:37,380 --> 00:04:40,410 then in this case we want to keep drawing cards. 71 00:04:41,100 --> 00:04:43,350 We're going to take the computers cards 72 00:04:43,830 --> 00:04:48,830 and we're going to use the append to add a card by dealing another card to the 73 00:04:49,560 --> 00:04:50,393 computer. 74 00:04:51,120 --> 00:04:56,120 And then we're going to recalculate the computer_score so that it updates 75 00:04:56,760 --> 00:05:00,570 and this while loop is evaluated on the latest score. 76 00:05:01,260 --> 00:05:06,150 So the computer_score is going to equal calculate_score using the computer's 77 00:05:06,150 --> 00:05:06,983 cards. 78 00:05:07,740 --> 00:05:12,740 And that means that the updated computer_score is equal to the return value from 79 00:05:13,680 --> 00:05:18,600 calculate_score. So that's hint 12 complete. In the next step 80 00:05:18,660 --> 00:05:22,020 we're going to start comparing our player's hand with the dealer's hand. 81 00:05:22,350 --> 00:05:23,430 See you in the next lesson.