1
00:00:11,970 --> 00:00:17,460
Welcome, welcome, welcome, and this lecture will continue discussing if statements and this will

2
00:00:17,460 --> 00:00:19,350
be the closure of theory.

3
00:00:19,650 --> 00:00:26,060
And first of all, let's begin talking about a term which is called and pass statement.

4
00:00:26,460 --> 00:00:31,140
So the statement is used as a placeholder for future code.

5
00:00:31,680 --> 00:00:41,220
You can see him as a sort of a gate to the flow of code and no active action is made once once it is

6
00:00:41,220 --> 00:00:42,090
executed.

7
00:00:42,480 --> 00:00:47,890
So what actually happens once the code meets these that pass statement?

8
00:00:48,270 --> 00:00:54,030
So first of all, when the first statement is executed and nothing happens, surprising, right.

9
00:00:54,270 --> 00:00:57,510
But it has its advantages and it has its purpose.

10
00:00:58,110 --> 00:01:05,760
If used in an if statement, empty code will be allowed, meaning, for example, you have a random

11
00:01:05,760 --> 00:01:06,540
if statement.

12
00:01:07,140 --> 00:01:14,550
So usually you have like if something, for example, bigger than a number, then you put the two dots

13
00:01:14,550 --> 00:01:21,540
and then under the if you put some code, for example, print something, if you leave the place under

14
00:01:21,540 --> 00:01:24,410
the if empty, you will have an error.

15
00:01:24,540 --> 00:01:26,160
We will see it in a few minutes.

16
00:01:26,550 --> 00:01:34,480
So B if the pass statement lets us to leave that place under the if empty without an error.

17
00:01:34,590 --> 00:01:34,950
All right.

18
00:01:35,520 --> 00:01:41,550
So the third Thurbert, without bas having an empty code under the F will raise an error.

19
00:01:42,060 --> 00:01:47,350
And also that allows you to take a passive approach in if statements.

20
00:01:48,090 --> 00:01:48,370
All right.

21
00:01:48,390 --> 00:01:51,120
So let's see some examples right here.

22
00:01:51,810 --> 00:01:52,140
All right.

23
00:01:52,150 --> 00:01:57,870
So here we have an example of an if statement, really simple one.

24
00:01:57,870 --> 00:01:59,910
We have A equals thirty three.

25
00:02:00,150 --> 00:02:01,770
B equals two hundred.

26
00:02:01,980 --> 00:02:07,350
And right here under the if we stay here, if B bigger than A, which is true.

27
00:02:07,620 --> 00:02:10,140
So we want some code to be executed.

28
00:02:10,380 --> 00:02:14,900
So you can see here let the part if empty without a print action.

29
00:02:14,910 --> 00:02:19,410
So under the F right here we don't have anything, we don't have any print, we don't have nothing.

30
00:02:20,250 --> 00:02:25,530
Also Bas is missing and you can see a small error marker appears.

31
00:02:25,530 --> 00:02:28,240
You can see the small red marker right here.

32
00:02:28,530 --> 00:02:35,880
This means we have some error in the code and once we execute the code, we simply get that syntax error.

33
00:02:36,030 --> 00:02:43,800
OK, so our execution fails because we haven't put anything under the IF and this is a wrong approach

34
00:02:43,800 --> 00:02:44,650
for coding.

35
00:02:44,670 --> 00:02:45,060
All right.

36
00:02:45,060 --> 00:02:51,300
You want to be the best, so you don't want to be to do these kinds of mistakes, having some syntax

37
00:02:51,300 --> 00:02:53,490
errors as simple as that.

38
00:02:53,760 --> 00:02:54,060
All right.

39
00:02:54,070 --> 00:03:01,350
So this example is without having anything under the F, and this gives us a simple error, syntax error.

40
00:03:02,520 --> 00:03:07,080
And right here you can see the second example with the same if condition.

41
00:03:07,080 --> 00:03:11,520
And you can see also under the if we don't have any print, we don't have anything here.

42
00:03:12,510 --> 00:03:15,150
We just added a statement mentioned here.

43
00:03:15,330 --> 00:03:21,210
And you can see there is no red marker that indicates of a code error right here.

44
00:03:21,600 --> 00:03:29,430
And also, once we execute this code you see here, process finishes finished with exit code zero.

45
00:03:29,820 --> 00:03:34,380
This means we do not have any error in the code once executing.

46
00:03:35,160 --> 00:03:35,550
All right.

47
00:03:35,560 --> 00:03:43,220
So in some occasions you would like to do nothing once you get inside and if statement or inside an

48
00:03:43,260 --> 00:03:47,490
ELIF or inside and else, you just don't want to do anything.

49
00:03:47,760 --> 00:03:52,480
And the pass statement lets you do it and that's about it.

50
00:03:52,530 --> 00:03:57,770
This is the purpose of BAS and I guess you will see it in the practice part as well.

51
00:03:57,960 --> 00:04:04,320
It's not very complicated, but it is crucial to know it because you're going to use it also in future

52
00:04:04,320 --> 00:04:05,310
topics as well.

53
00:04:05,670 --> 00:04:06,160
All right.

54
00:04:06,210 --> 00:04:08,180
So we're finished with this lecture.

55
00:04:08,190 --> 00:04:09,580
I will see you in the next video.

56
00:04:09,690 --> 00:04:10,200
Thank you.