1
00:00:01,320 --> 00:00:02,130
‫Welcome back.

2
00:00:02,160 --> 00:00:05,490
‫Now that you know how to use properties, it's time for a little challenge.

3
00:00:05,490 --> 00:00:07,500
‫And this one is really just a little one.

4
00:00:07,500 --> 00:00:13,860
‫So please go ahead and create a read only property called Front Surface, which calculates the front

5
00:00:13,860 --> 00:00:16,110
‫surface based on height and length.

6
00:00:16,830 --> 00:00:19,530
‫So please pause the video and try to do that, please.

7
00:00:21,540 --> 00:00:22,200
‫All right.

8
00:00:22,290 --> 00:00:23,400
‫I hope you tried it.

9
00:00:23,400 --> 00:00:31,260
‫I'm just going to create it at the bottom below all of our properties, and I'm going to make it an

10
00:00:31,260 --> 00:00:34,470
‫int and call it front surface.

11
00:00:36,090 --> 00:00:42,540
‫And now in here I only have a get because it's a read only, so I cannot set it.

12
00:00:42,540 --> 00:00:43,820
‫That's really important.

13
00:00:43,860 --> 00:00:52,020
‫Return height multiplied with length that we are.

14
00:00:52,260 --> 00:00:57,210
‫So now of course when we do that we should also check it out.

15
00:00:57,210 --> 00:01:02,700
‫So I didn't write that as a challenge, but of course you want to see what the front surface is.

16
00:01:02,700 --> 00:01:13,830
‫So I'm just going to write C double DU and here it's going to be front surface of the box is and then

17
00:01:14,490 --> 00:01:24,900
‫it's going to be the box dot front surface and of course the comma has to be placed there as well.

18
00:01:24,900 --> 00:01:26,460
‫So now let's run it.

19
00:01:28,340 --> 00:01:31,250
‫And we are front surface of the box is 20.

20
00:01:31,550 --> 00:01:33,950
‫That is a length times height.

21
00:01:33,950 --> 00:01:38,780
‫So five times four is going to be 20 and that's exactly what we have.

22
00:01:38,780 --> 00:01:43,910
‫So you could go ahead and adjust the box class as you please.

23
00:01:43,910 --> 00:01:49,370
‫You could add the diagonal, you could add all kinds of things to the box.

24
00:01:49,370 --> 00:01:54,500
‫For example, the weight you could base the weight on the length and height or on the volume.

25
00:01:54,500 --> 00:02:00,830
‫So, you know, for example, that it's metal or well, the stone or something like that.

26
00:02:00,830 --> 00:02:06,350
‫And based on the stone that is in there, you could calculate how heavy it is or whatever you can come

27
00:02:06,350 --> 00:02:06,920
‫up with.

28
00:02:07,220 --> 00:02:10,370
‫So that's properties and yeah, see you in the next video.