WEBVTT 00:00.940 --> 00:06.580 Hello, everyone, in this session, we will discuss about functions, so first of all, let us see 00:06.580 --> 00:08.760 what is the need of creating a functioning. 00:09.220 --> 00:14.940 So let us look at this particular piece of food that I have created, a list of numbers. 00:16.000 --> 00:18.700 The list contains numbers from one to seven. 00:19.930 --> 00:29.860 I have created a variable which has value, and I'm iterating on double this number list, which will 00:29.860 --> 00:32.230 retrieve one number at the time. 00:32.800 --> 00:42.040 And then I'm adding the number to the desired so that I get the value as a sum of the entire number 00:42.040 --> 00:42.400 list. 00:42.850 --> 00:47.860 So let us print the result, which is intermediate. 01:03.160 --> 01:05.350 Let us see the intermediate results until. 01:07.410 --> 01:14.820 So here you can see the number is additionally zero, it added the value one to it, then it added the 01:14.820 --> 01:20.160 value to three and four so that it adds all the values together. 01:20.160 --> 01:22.910 And finally you get twenty eight as a result. 01:23.220 --> 01:28.020 So we are getting a some of the value of a set of numbers here. 01:28.710 --> 01:34.980 Now this is just one scenario, so let us think what will happen if you want to do the same addition 01:34.990 --> 01:40.320 operation several times so would be writing this entire piece of food. 01:40.650 --> 01:47.220 Again and again that is not really feasible and that would not be even more feasible when we have a 01:47.220 --> 01:51.520 very long piece of wood, which you want to use again and again. 01:51.870 --> 01:55.410 So in this particular situation, we will be using functions. 01:55.740 --> 01:59.770 These functions will help us to run a particular piece of food. 01:59.790 --> 02:02.280 Again and again without the right thing, it. 02:10.530 --> 02:18.870 So let us see what the functions of function is, an independent and reuseable block of food, which 02:19.080 --> 02:23.840 you can call any number of things from any place in the program. 02:24.450 --> 02:30.200 So I need not read this particular piece of food just when I want to live. 02:30.240 --> 02:32.840 I can create it whenever I want. 02:33.090 --> 02:37.780 It can be present anywhere in the program and I can call it whenever I want to eat. 02:38.460 --> 02:44.190 It is an essential tool for programmers to split a big project into smaller modules. 02:44.430 --> 02:46.400 Now, how is it also useful? 02:46.710 --> 02:54.120 That is, if I want to use this particular code again and again and I want to store it somewhere so 02:54.120 --> 02:58.120 that it is more simpler to see, then I can use a function. 02:58.140 --> 03:01.280 So let's see how a function would be created out of this. 03:01.620 --> 03:05.460 So to create a function, we can get this entire Diaco. 03:06.590 --> 03:14.120 So to begin with the function, we will need the definition giver, which is this, this means that 03:14.120 --> 03:16.530 we are starting to define a particular function. 03:17.030 --> 03:18.970 Then we give a function name. 03:19.130 --> 03:21.990 So let's say we want to create a function for adding. 03:22.010 --> 03:23.940 So we are seeing naming it either. 03:25.120 --> 03:31.570 After that, in the round bracket, we need to give the argument which will be given to it the input 03:31.590 --> 03:38.160 parameters, so this entire function will work on the no list, which will mean we will be providing. 03:38.440 --> 03:41.480 So we will mean no list. 03:41.740 --> 03:48.040 You can name it anything other than the colon, which would mean that the definition of the function 03:48.040 --> 03:50.940 is starting now. 03:50.950 --> 03:53.740 We will give the indentation without indentation. 03:53.740 --> 04:01.850 It will not understand that the food which we are about right now is a part of this entire function. 04:02.080 --> 04:03.670 So let us start writing the code. 04:03.970 --> 04:08.840 So in this particular piece of code, we will need the number list again, but we already have it. 04:08.860 --> 04:13.140 So we don't really need it now because it has already been defined. 04:13.510 --> 04:18.760 Now, each time the function will run, we would have to meet the value of the desired. 04:19.420 --> 04:23.440 So that is the reason why we will put it equal to zero here. 04:26.510 --> 04:29.450 Then we will need the entire I don't. 04:34.910 --> 04:37.560 So this is the entire piece of code now. 04:37.600 --> 04:43.890 We don't really want to bring in the media results because we want this to walk silently. 04:43.910 --> 04:47.560 I'm just giving them to us so we will not bring that here. 04:48.360 --> 04:53.140 Now, these intermediate results, we will not be printing now. 04:53.150 --> 04:59.720 It will again be invented because this result is a part of this Falu. 05:00.890 --> 05:03.260 And the sprint is the final sprint. 05:05.090 --> 05:12.710 Now, if you want to run this, so for this post, we will shift and this means that that function has 05:12.710 --> 05:13.470 been defined. 05:13.830 --> 05:20.240 Now the definition has been completed, the function has been created, but we have not really called 05:20.240 --> 05:23.970 the function now without calling the function, it will not run. 05:24.320 --> 05:25.960 So, two, done this function. 05:25.980 --> 05:27.370 We will have to foil it. 05:27.620 --> 05:29.330 So we will see this. 05:30.560 --> 05:35.840 I we will give the no list again, so we will see novelist. 05:38.030 --> 05:47.870 Now, if the shift into this will run the Diaby support, which was a part of this definition and give 05:47.870 --> 05:52.640 us the desired, because we have already asked it to frame the desire for expanding the desire for us 05:52.880 --> 05:55.520 now if we don't ask it to bring the desired. 05:59.430 --> 06:05.700 So we will have done this again once we did this and then when we done this, it will not give any result, 06:05.700 --> 06:07.860 although it has completed running. 06:08.520 --> 06:14.910 Now let us say we don't really want to predict the result, but we want to use it for some other. 06:16.990 --> 06:23.250 So what we can do is instead of pretending that we can simply resume the research, 06:26.260 --> 06:33.220 so when we see the dome, that is once this function would run, it will return a particular value to 06:33.220 --> 06:33.510 us. 06:33.790 --> 06:34.750 So let us see. 06:35.560 --> 06:36.640 Let us run this. 06:36.940 --> 06:45.190 Now, what we can do is we can either print that is out that we can, which we get from the Idaho. 06:46.330 --> 06:51.730 So here we can do this or we can simply take this into a variable. 06:54.810 --> 07:02.390 And we can use it later, such as the last five, and we just want to print. 07:08.260 --> 07:10.460 And let us bring virosome. 07:15.850 --> 07:21.540 So here you can see we can use the value statically after returning it from the desert. 07:22.480 --> 07:28.570 Now the name which we have given in the definition need not really be the exact name which we will be 07:28.570 --> 07:34.300 using here, the name which will be coming to the function so it can have any value. 07:34.420 --> 07:36.070 So let's say it is an. 07:37.190 --> 07:40.950 OK, so when we see those in, it will still walk the same way. 07:40.970 --> 07:42.620 It doesn't make any difference. 07:48.130 --> 07:57.430 Now, let us see another thing, let us try to create another function which will add multiple input 07:57.430 --> 07:58.010 values. 07:58.270 --> 08:00.280 So let us define another function. 08:01.690 --> 08:04.450 Let us call it either do I'm in this. 08:04.450 --> 08:11.300 We are taking numbers I g so we are taking two numbers and I enjoy. 08:12.130 --> 08:15.370 Now, if you can say that here, we are not giving any particular data. 08:15.670 --> 08:23.500 So this means that it can take any time and it will automatically understand the data to be whatever 08:23.500 --> 08:24.490 we are providing. 08:25.150 --> 08:27.810 Now we see a dissolve is equal to zero. 08:28.300 --> 08:35.800 Now instead of dissolved equal to zero, we can simply not give a definition to result because we will 08:35.800 --> 08:39.970 be anyhow adding these two numbers and we can see a desired. 08:41.630 --> 08:43.040 Is equal to. 08:46.300 --> 08:49.900 We will have to give just a single indentation result is equal to. 08:51.100 --> 08:55.670 I love you and we concentrated on you. 08:57.120 --> 09:03.330 Now, I want to call it, I will say I do and I will, given the numbers here. 09:08.140 --> 09:09.460 And when I ran this. 09:12.050 --> 09:15.320 It will return the some of these values. 09:16.340 --> 09:20.480 Now, another thing, what I can do is instead of writing it this way. 09:24.420 --> 09:30.840 I can return this directly so I don't have to create a new variable result for this. 09:36.260 --> 09:37.850 And it will we'll just see. 09:39.480 --> 09:47.370 So this is about functions now, using the same time I'm using similar process, you can create a much 09:47.370 --> 09:50.910 complex function and use it in your project. 09:52.480 --> 09:53.080 Thank you.