1
00:00:00,920 --> 00:00:02,810
All right, exercise number five.

2
00:00:05,180 --> 00:00:09,920
If we look at the output, it seems like we want to get some kind of pyramid that skips every second

3
00:00:09,920 --> 00:00:12,470
row and prints the letter that follows.

4
00:00:12,920 --> 00:00:16,490
Let's hope the code that we have print anything remotely similar.

5
00:00:23,880 --> 00:00:25,260
And what the heck is this?

6
00:00:25,710 --> 00:00:27,740
We definitely have our work cut out for us.

7
00:00:27,780 --> 00:00:29,130
OK, where do we start?

8
00:00:29,640 --> 00:00:30,270
You know what?

9
00:00:30,300 --> 00:00:31,220
I have no idea.

10
00:00:31,230 --> 00:00:36,570
So I'm going to do is just place a bunch of break points and just try to see why this code is behaving

11
00:00:36,570 --> 00:00:37,530
the way that it is.

12
00:00:45,330 --> 00:00:51,720
OK, so the first part of the outer loop is one, I imagine this two is not zero skipping the statement

13
00:00:52,260 --> 00:00:57,540
and as soon as we enter the inner loop, A gets converted to another letter before it has the chance

14
00:00:57,540 --> 00:00:58,440
to get printed.

15
00:01:03,600 --> 00:01:04,569
That's not right.

16
00:01:04,590 --> 00:01:07,130
If you look at the output, we need to print the letter A..

17
00:01:07,770 --> 00:01:11,010
So what I'm going to do is start by moving this after the print function.

18
00:01:15,660 --> 00:01:16,790
All right, let's try again.

19
00:01:24,430 --> 00:01:30,490
OK, just not smaller than I, so it prints the letter A, OK, and now if I look back at the output,

20
00:01:30,490 --> 00:01:35,650
I need to start a new line, but this inner loop is going to run ten times before the next new line,

21
00:01:36,130 --> 00:01:37,520
which is not what we want to do.

22
00:01:37,930 --> 00:01:42,950
So right there, by visualizing the runtime using breakpoints, I've already identified the second bug.

23
00:01:43,600 --> 00:01:49,300
So once again, the amount of times the inner loop runs depends on the outer loop index, not a static

24
00:01:49,300 --> 00:01:50,100
value of ten.

25
00:01:50,380 --> 00:01:51,610
So we'll change that.

26
00:01:52,180 --> 00:01:54,760
And OK, I think we might be on to something.

27
00:01:54,760 --> 00:01:55,630
Let's run the code.

28
00:02:10,110 --> 00:02:14,430
Hmm, it's skipping a whole lot of letters that can't be good.

29
00:02:21,620 --> 00:02:23,090
Let's relaunch the debugger.

30
00:02:40,340 --> 00:02:41,780
OK, we're fine here.

31
00:02:46,650 --> 00:02:50,040
So at this point, I equals two and it's about to set this run.

32
00:02:54,100 --> 00:02:54,940
Equals three.

33
00:03:04,560 --> 00:03:09,120
Oh, I see every time it prints an empty space, it also increments the letter.

34
00:03:25,160 --> 00:03:28,340
So this line should be in the outer loop, not the inner loop.

35
00:03:32,230 --> 00:03:33,910
All right, restart the debugger.

36
00:03:43,630 --> 00:03:44,710
Prince, the letter A.

37
00:03:48,140 --> 00:03:49,400
Skips the next one.

38
00:03:59,950 --> 00:04:01,050
And that's all.

39
00:04:04,750 --> 00:04:07,550
Good job on debugging, exercise number five.

40
00:04:08,110 --> 00:04:11,770
This was definitely not an easy one to debug, but we made it.