1
00:00:02,110 --> 00:00:04,770
So now we're going to do some practice on court blocks.

2
00:00:04,990 --> 00:00:07,200
We are not going to create a new class for this.

3
00:00:07,210 --> 00:00:11,440
We're going to use the code we created in the contraflow coding lecture.

4
00:00:12,190 --> 00:00:12,610
All right.

5
00:00:12,610 --> 00:00:15,720
We are going to use the example we used in the previous video.

6
00:00:16,210 --> 00:00:21,970
So block starting, curly brace and and the ending braces added.

7
00:00:22,570 --> 00:00:23,260
That's great.

8
00:00:23,260 --> 00:00:24,330
And in there, one, two.

9
00:00:24,850 --> 00:00:30,030
So starting curly brace and and incorporate it into here.

10
00:00:30,700 --> 00:00:33,510
Now, define a number of owners variable.

11
00:00:33,520 --> 00:00:42,380
So and number of owners equals five and a semicolon.

12
00:00:43,000 --> 00:00:48,790
Now in the inner block use double plus sign operator or number of owners.

13
00:00:52,230 --> 00:00:59,200
And a semicolon and print out the number of owners after the inner block, so extended out the printer

14
00:00:59,220 --> 00:01:09,990
and double quotes a number of owners column and MySpace, plus sign number of owners.

15
00:01:11,170 --> 00:01:12,250
Now, right now called.

16
00:01:15,410 --> 00:01:19,830
A number of owners, six is printed out after the not defined category line.

17
00:01:20,090 --> 00:01:24,350
Now move the definition of number of owners into the inner block.

18
00:01:24,950 --> 00:01:33,290
So deleted from here and pasted here, as you can see, intergrated out the variable name, take the

19
00:01:33,290 --> 00:01:35,180
cursor on the variable name.

20
00:01:35,540 --> 00:01:40,460
It says variable number of owners is assigned but never accessed.

21
00:01:40,460 --> 00:01:47,850
And if you take the cursor to the line under that, the value change, that number of owners plus plus

22
00:01:47,870 --> 00:01:48,890
is never used.

23
00:01:49,400 --> 00:01:56,170
And also in the printout line, variable name is read, it says cannot resolve a simple number of owners.

24
00:01:56,690 --> 00:01:57,920
These are all correct.

25
00:01:58,190 --> 00:02:04,580
As I said, the variable was created in the inner block and cannot be accessed after it because they

26
00:02:04,580 --> 00:02:05,940
don't exist anymore.

27
00:02:06,530 --> 00:02:20,370
If you scroll up and define a variable inside the if block like string hello equals hello, I'm the

28
00:02:20,420 --> 00:02:23,210
semicolon and you would like to print out hello.

29
00:02:25,440 --> 00:02:27,420
System that outdoes Princetonian.

30
00:02:28,920 --> 00:02:33,980
How do you get the same error here to now revet all changes?

31
00:02:34,930 --> 00:02:36,430
So the latest from here.

32
00:02:37,750 --> 00:02:38,740
This one here.

33
00:02:40,400 --> 00:02:43,370
And move it back here.

34
00:02:44,090 --> 00:02:49,140
All right, that's all I wanted to say about coding blocks for now, I hope it was clear.

35
00:02:49,400 --> 00:02:50,830
See in the next lecture.