WEBVTT 00:01.120 --> 00:03.760 Hello and welcome back to the costs Sunday. 00:03.790 --> 00:09.430 Last two sessions we learned already about the data types integers and floats. 00:09.430 --> 00:17.160 And in this session we want to repeat and deepen our understanding of those two data types. 00:17.170 --> 00:22.120 So first of all we assign variables to let's say five. 00:22.150 --> 00:29.290 So we assign the arrival eight to five and we assign B to the Internet two. 00:29.980 --> 00:37.960 And we check the data types of A and B so I would expect that A and B are integers. 00:38.320 --> 00:39.070 That's true. 00:39.070 --> 00:44.620 Here you can see Integer Integer and what we already learned. 00:44.620 --> 00:46.310 I mean integer floats. 00:46.330 --> 00:54.850 That's both them are ordinary numbers where we can apply a mathematical operations like addition so 00:54.850 --> 00:59.230 we can add a plus b we can add B plus a. 00:59.320 --> 01:05.410 So no surprise we get seven and both uh and both operations that we can subtract. 01:05.410 --> 01:08.620 So A minus B plus three. 01:08.620 --> 01:15.280 We can also create negative numbers B minus a gives us minus three. 01:15.280 --> 01:20.430 And also we can multiply two integers and get 10. 01:20.740 --> 01:26.360 And uh what we also already learned is that by dividing into Test B. 01:26.380 --> 01:26.550 Yeah. 01:26.560 --> 01:28.230 We get on and float object. 01:28.240 --> 01:39.310 So if we uh divide a divided by B So five divided by two we get 2.5 and we assign 2.5 to the right of 01:39.310 --> 01:39.780 C.. 01:40.690 --> 01:42.760 So C is 2.5. 01:43.000 --> 01:51.360 And uh the data type of C is a float object and that's actually the difference between antigen and then 01:51.360 --> 01:55.710 float integers a number that can be written without fractional component. 01:55.740 --> 02:01.290 So 5 or 2 both don't have any any decimal. 02:01.440 --> 02:09.510 And in contrast a float object has a decimal so if you can see here C has a that one decimal point five 02:11.210 --> 02:16.310 at this point I want to highlight the different data types have different functionality and all the 02:16.400 --> 02:21.570 data types have so-called built in methods or attributes. 02:21.620 --> 02:27.560 So actually at this point I don't want to go into detail of object oriented programming but I want to 02:27.560 --> 02:32.420 show you the practical use of the so-called methods and attributes. 02:32.420 --> 02:41.480 So let's have a look at um the float the float object see and we can call the method as integer array 02:41.480 --> 02:53.640 so by pressing C dot and then s integer ratio and if we execute the cell here it can see that C as an 02:53.640 --> 02:56.820 integer Horatio is five divided pi 2. 02:57.150 --> 03:03.420 So this is called a method because Python internally calculates something based on our object. 03:03.450 --> 03:04.200 Um yeah. 03:04.200 --> 03:05.490 2.5. 03:05.490 --> 03:11.100 So it returns the integer ratio of 5 will divided by 2. 03:11.550 --> 03:20.490 And we can also browse or search for built in methods or attributes by just uh uh let's take uh the 03:20.670 --> 03:28.110 float C dot and then press tab and then we can see what Python offers us. 03:28.140 --> 03:37.000 So we have a method as integral ratio and uh with quite a few methods and then attributes here. 03:37.020 --> 03:44.500 So for instance we can call the method as integer and executed. 03:44.540 --> 03:52.290 Okay so now python is checking if C as a float as an integer and obviously it's not an integer so it 03:52.290 --> 04:04.380 returns a false so now if you go to our variable B is the B stands for 4 2 so it's B is an integer and 04:04.390 --> 04:07.740 then we can call the attribute denominator. 04:10.270 --> 04:14.220 And numerator Casale actually that squared. 04:14.280 --> 04:14.930 Yeah. 04:15.150 --> 04:18.890 I mean that's not too much too much more information here. 04:18.900 --> 04:21.990 So two is made of the numerator. 04:21.990 --> 04:23.490 Two divided by one. 04:23.490 --> 04:26.670 So that's not not too much helpful actually. 04:27.780 --> 04:36.060 And we can also check here what other methods or attributes we have by pressing the tap key bit length 04:36.120 --> 04:37.340 conjugate. 04:37.740 --> 04:39.870 It's not too interesting for us now. 04:39.990 --> 04:48.300 So I think we should go on and um yeah let's let's calculate 11 divided by three and assign it to the 04:48.300 --> 04:49.890 variety of D. 04:50.160 --> 04:52.700 Gives us three points six six six. 04:53.550 --> 05:01.330 And the if you call now the method as integer ratio you have to get quite quiet. 05:01.360 --> 05:02.440 Um yeah. 05:02.540 --> 05:04.260 It doesn't give us what we expected. 05:04.290 --> 05:09.750 Um eleven and three because um the float a C uh by default around it. 05:09.780 --> 05:10.630 After uh. 05:10.770 --> 05:18.290 I don't know the tenth uh digit so now I mean doesn't have too much here. 05:18.300 --> 05:21.570 The two numbers but nice to know actually. 05:21.760 --> 05:22.940 And um yeah. 05:22.950 --> 05:31.030 What we can also do we can call a function on an object like this or a function like round so we can 05:31.030 --> 05:36.610 round our float object and let's press shift tab to. 05:36.680 --> 05:44.920 Okay we can round a number so it s d s stands for a float and we can also determine the number of digits. 05:44.920 --> 05:54.640 So if we take here 1 so we can round our float object here to 1 digit and we get three point seven. 05:54.670 --> 06:03.940 So if we change it here to 2 we get three point six seven obviously with uh into the integers rounding 06:03.940 --> 06:08.240 doesn't make really sense because we are an integer doesn't have any digits. 06:08.410 --> 06:17.740 And what we can also do we can transform our flowed into an integer by calling the function int so INT. 06:17.800 --> 06:24.300 And then in brackets to give them the corresponding integer to the float D. 06:24.580 --> 06:31.420 And what Python actually does it just cuts here um all digits so that's not rounding if it's would round 06:31.450 --> 06:38.380 so we would get four but it's just cutting here after the three and we get um the integer three 06:41.260 --> 06:51.110 and we can also transform an integer A stands for five into a float and gives us five point zero and 06:51.110 --> 06:54.170 there are two ways to transform an integer into a float. 06:54.290 --> 07:03.830 So either we call the function float or um so let's check first of all the type of uh five should be 07:03.830 --> 07:04.520 an integer. 07:04.910 --> 07:16.280 And if you just press 5 dot 0 Python recognizes 5.0 as a float and even we don't have to press 0 so 07:16.310 --> 07:20.070 only five point nothing gives us a float. 07:20.070 --> 07:27.220 So Python treats as of a float and also here there are two ways to transform an integer into a string. 07:27.770 --> 07:38.110 So either by uh setting or putting five into quotation marks or by calling the s t r function. 07:38.410 --> 07:44.930 So by calling a c r our five will be transformed into a string. 07:44.990 --> 07:47.040 All right so that s the same as here. 07:47.970 --> 07:48.200 Yeah. 07:48.200 --> 07:50.360 That's it for now at this point. 07:50.360 --> 07:54.880 So that's not much more to say about integers and floats and. 07:54.970 --> 07:55.490 Yeah. 07:55.510 --> 07:58.550 In the next session we will have a deeper look into uh. 07:58.580 --> 07:59.430 String object. 07:59.430 --> 08:03.980 So hope you enjoyed it and uh hope to see you in the next session. 08:04.010 --> 08:04.280 By.