WEBVTT 00:00.230 --> 00:00.920 Hello guys. 00:00.920 --> 00:03.560 So we are going to continue the discussion with respect to Python. 00:03.560 --> 00:07.640 And in our previous video we have already completed operators. 00:07.640 --> 00:13.040 And if you remember we have completed one complete section with respect to Python basics, uh, we understood 00:13.040 --> 00:15.020 about variables, data types and operators. 00:15.020 --> 00:20.450 Right now we are going to go towards an amazing new topic in Python, which is called as Control Flow. 00:20.450 --> 00:24.770 And in Control Flow, we are going to discuss about conditional statements and loops. 00:24.830 --> 00:28.970 In this video we are going to focus more on conditional statement. 00:28.970 --> 00:34.220 So here is the entire video outline what all things we are going to discuss. 00:34.220 --> 00:38.120 So first of all we are going to see introduction to Conditional statements. 00:38.120 --> 00:42.560 Then we'll go and understand what is if statement how to write if statement. 00:42.560 --> 00:44.000 With the help of Python. 00:44.000 --> 00:49.970 Then you have else statement, then you have else if statement then you have nested conditional statements. 00:50.000 --> 00:53.990 Along with this we will be implementing a lot of practical examples. 00:53.990 --> 00:54.230 We. 00:54.230 --> 00:58.100 I will be showing you multiple examples of real world use case examples. 00:58.100 --> 00:59.810 And then we'll try to solve that. 00:59.840 --> 01:04.730 Apart from that, The final thing is that we'll also see what are the common errors and what is the 01:04.730 --> 01:10.040 best practices that we should follow whenever we are using conditional statement with respect to if 01:10.070 --> 01:11.690 Elif and else. 01:11.780 --> 01:14.990 Now let's go ahead and let's start our coding. 01:14.990 --> 01:19.550 First of all, let's understand what is if statement right. 01:19.550 --> 01:22.340 And this is really important for you all to understand. 01:22.340 --> 01:27.860 And as I have always said before you start any Jupyter notebook, make sure you select the kernel with 01:27.860 --> 01:30.740 respect to the virtual environment that you have created. 01:30.770 --> 01:38.540 Now, if statement evaluates a condition and executes the block of code within it, if the condition 01:38.540 --> 01:40.730 is true, okay, what does this basically mean? 01:40.730 --> 01:44.240 Let's say that I am writing age is equal to 20, right? 01:44.240 --> 01:52.040 And now if I am writing an if statement after this, if we will be putting any conditions over here, 01:52.040 --> 01:55.520 let's say if I write, if age is greater than or equal to 20. 01:55.520 --> 01:57.200 So this is one of the condition. 01:57.230 --> 01:57.650 Right. 01:57.650 --> 02:01.990 So this if statement is going to evaluate this particular condition? 02:02.260 --> 02:07.330 And if it is true, right, it is going to go inside this particular block. 02:07.330 --> 02:07.810 Right. 02:07.810 --> 02:10.990 And obviously you know about indentation directly. 02:10.990 --> 02:14.080 You will be seeing that will be able to write the code inside the block. 02:14.080 --> 02:16.420 So here I will go ahead and write, print. 02:17.260 --> 02:21.070 Um, let's say that uh, I will go ahead and write age 18. 02:21.070 --> 02:25.330 And if the age is greater than or equal to 18 okay. 02:25.360 --> 02:27.280 And here I will go ahead and write 20. 02:27.310 --> 02:27.880 Okay. 02:28.000 --> 02:37.120 Then I will say that, hey, uh, you are allowed to vote in the elections, right? 02:37.120 --> 02:38.350 Something like this. 02:38.380 --> 02:39.670 Vote in the elections. 02:39.670 --> 02:42.160 So here you can probably see the output. 02:42.160 --> 02:44.470 You are allowed to vote in the elections. 02:44.470 --> 02:45.910 What does this basically mean? 02:46.000 --> 02:52.390 When I started my if statement, first of all the condition that I have written it, this will get evaluated. 02:52.390 --> 02:58.660 And obviously here you can see the age is greater than or equal to 80 because I have assigned the age 02:58.660 --> 03:01.420 variable is equal to 20 right now. 03:01.420 --> 03:06.160 Since this is greater than or equal to 18, you will be able to see that this entire condition will 03:06.160 --> 03:06.880 become true. 03:06.910 --> 03:08.620 This entire condition will become true. 03:08.620 --> 03:11.590 So it will go ahead and execute this particular statement. 03:11.620 --> 03:12.070 Right. 03:12.070 --> 03:16.870 And this is a very simple way of understanding if statement. 03:16.900 --> 03:21.250 Let me repeat again a if statement evaluates a condition. 03:21.250 --> 03:27.670 So this is my condition and it executes the block of code within it if the condition is true. 03:27.670 --> 03:29.410 So right now this condition is true. 03:29.410 --> 03:32.170 So that is why it is basically getting executed. 03:32.170 --> 03:34.300 How do I say this condition is true or not. 03:34.300 --> 03:40.330 If I just go and execute in my new cell and if I see age is greater than or equal to 18, this is true. 03:40.330 --> 03:43.900 So if true, I am going to go inside this particular block. 03:43.900 --> 03:45.910 So this was about if statement. 03:45.940 --> 03:47.980 Don't worry we will be seeing a lot of example. 03:48.010 --> 03:54.280 Now let me go ahead and show you the another uh conditional statement which we basically say is else 03:54.310 --> 03:55.210 right now. 03:55.210 --> 03:57.100 What exactly is else okay. 03:57.760 --> 04:02.250 Uh, to define else, I would like to, uh, probably talk about this. 04:02.280 --> 04:02.640 Okay. 04:02.670 --> 04:05.670 And let me just go ahead and write a comment over here again. 04:05.700 --> 04:13.260 The else statement executes a block of code if the condition in the if statement is false. 04:13.290 --> 04:14.430 What does this mean? 04:14.430 --> 04:19.380 That if this statement is false, it is not going to go inside this block. 04:19.380 --> 04:19.860 Right? 04:19.860 --> 04:23.940 So is there a way that I can probably move it into another block. 04:23.940 --> 04:24.420 Right. 04:24.420 --> 04:27.690 So for that we will be specifically using else statement. 04:27.690 --> 04:30.330 So let us go ahead and see one more example. 04:31.470 --> 04:34.590 So guys now let's go ahead and see this else statement. 04:34.590 --> 04:35.700 And how does it work. 04:35.730 --> 04:39.030 Okay let me just go ahead and write. 04:39.120 --> 04:42.450 Age is equal to 16 okay. 04:42.540 --> 04:45.690 And now you know the condition if you really want to vote. 04:45.720 --> 04:45.990 Right. 04:46.020 --> 04:47.730 So what is the condition that I have to write. 04:47.760 --> 04:51.300 If age is greater than or equal to 18 right. 04:51.420 --> 05:02.340 Then I can go ahead and print something like you are you are eligible for voting. 05:02.370 --> 05:05.040 Okay, so this is my statement that I have written, right. 05:05.430 --> 05:07.860 Now let's let's go ahead and execute this. 05:07.860 --> 05:08.460 Right now. 05:08.460 --> 05:12.000 When I'm executing this, you can see that nothing is getting printed. 05:12.000 --> 05:15.990 The reason is very simple because this statement has become false. 05:16.020 --> 05:16.410 Right. 05:16.440 --> 05:19.050 And so you are actually coming outside the block. 05:19.050 --> 05:20.400 Nothing is getting printed. 05:20.400 --> 05:26.400 But let's say I want to handle for this age in a separate way within this if clause. 05:26.430 --> 05:26.910 Right. 05:26.910 --> 05:33.600 So what I can do, I can again go ahead and write else clause right now inside this else clause I will 05:33.600 --> 05:40.770 probably say print you are a minor okay. 05:40.770 --> 05:42.420 So this will be my else block. 05:42.420 --> 05:44.430 Now what will happen if I execute this? 05:44.460 --> 05:49.470 You'll be seeing that if this is false, what it is going to do by default, it is going to jump into 05:49.470 --> 05:50.490 this particular block. 05:50.490 --> 05:50.850 Right. 05:50.880 --> 05:53.280 Because this is what my else condition is, right? 05:53.280 --> 05:54.960 The default condition at the end. 05:54.990 --> 05:55.470 Right? 05:55.500 --> 06:00.690 If nothing is getting satisfied, just go and jump to the last else block and display this. 06:00.690 --> 06:05.090 So once I'm executing this, you'll be able to see that here you are getting an answer. 06:05.090 --> 06:05.900 You are a minor. 06:05.900 --> 06:09.050 So this became false after this basically became false. 06:09.230 --> 06:10.790 It is going to the else block again. 06:10.790 --> 06:16.670 Let me repeat the else statement executes a block of code if the condition in the if statement is false. 06:16.700 --> 06:19.640 Okay, so here you can probably see this okay. 06:19.670 --> 06:26.420 Now let me just go ahead and go ahead with the next conditional statement which is called as Elif statement. 06:26.450 --> 06:26.960 Okay. 06:26.990 --> 06:33.260 Now with respect to the Elif statement, uh, if I really want to give a smaller definition for this. 06:33.290 --> 06:33.560 What? 06:33.680 --> 06:36.020 Okay, what exactly is an if statement? 06:36.050 --> 06:40.640 Now, this Elif statement allows you to check multiple condition. 06:40.640 --> 06:43.190 It stands for else if. 06:43.220 --> 06:44.960 Okay, that is the reason we say Elif. 06:44.990 --> 06:46.160 Elif statement is there. 06:46.160 --> 06:49.220 But if we go ahead and see the full form, it is nothing but else. 06:49.220 --> 06:50.090 If okay? 06:50.090 --> 06:52.850 And it allows you to check for multiple condition. 06:52.880 --> 06:58.280 Okay, now let me just go ahead and probably put some points over here. 06:58.610 --> 07:00.890 Let's say I'll show you some example. 07:00.890 --> 07:03.180 If I go ahead and write, age is equal to 20. 07:03.210 --> 07:03.660 Okay. 07:03.690 --> 07:04.920 Now let me go ahead and write. 07:04.950 --> 07:08.430 If age is less than 13. 07:08.580 --> 07:09.090 Okay. 07:09.690 --> 07:11.370 I'm putting some kind of condition over here. 07:11.400 --> 07:16.140 Any condition you can put, you can go ahead and put an end condition or condition, whatever condition 07:16.140 --> 07:16.500 you want. 07:16.530 --> 07:19.020 So any conditional statements, you can write it over here. 07:19.290 --> 07:23.460 Um, you know, and obviously you have seen this kind of statements, right? 07:23.460 --> 07:26.100 Where I am actually putting some kind of conditions over here. 07:26.130 --> 07:26.550 Right? 07:26.640 --> 07:28.680 Uh, anything you can actually put over there. 07:28.710 --> 07:35.100 Now, if I go ahead and write print, if age is less than 13, I will say, hey, you are a child. 07:35.130 --> 07:35.370 Okay? 07:35.400 --> 07:36.330 You are a child. 07:36.570 --> 07:38.970 Now I want to check for other condition. 07:39.000 --> 07:39.330 Also. 07:39.330 --> 07:41.130 Let me go ahead and write Elif. 07:41.130 --> 07:44.070 Now, Elif, age is less than 18. 07:44.100 --> 07:47.340 Okay, if the if the age is less than 18, then I will go ahead and say. 07:47.340 --> 07:48.060 Print. 07:48.510 --> 07:50.220 You are a teenager. 07:50.550 --> 07:53.850 Okay, you are a teenager, right? 07:53.850 --> 07:55.860 And then I will go ahead and write. 07:55.890 --> 07:56.580 Else. 07:56.580 --> 07:58.590 Finally, the else statement. 07:58.590 --> 08:02.660 By default, this will get if none of this condition is basically becoming true. 08:02.690 --> 08:04.760 This will get executed then. 08:04.760 --> 08:11.030 If I go ahead and write over here print, I will say, hey, you are an adult, okay? 08:11.030 --> 08:13.850 And now if I go ahead and execute it, what will happen? 08:13.850 --> 08:18.170 Which part will get basically executed, whether this or this or this. 08:18.200 --> 08:18.590 Right. 08:18.590 --> 08:23.990 So here you can probably see if I go ahead and execute you'll be able to see, hey, you are an adult 08:24.020 --> 08:24.740 right now. 08:24.740 --> 08:28.730 If I go ahead and write 17 as my age. 08:28.760 --> 08:29.180 Right. 08:29.180 --> 08:33.680 So first condition over here you can see age is less than 13, which is obviously false. 08:33.680 --> 08:34.910 It will go to the next one. 08:34.940 --> 08:39.620 Else if it is not going to check multiple condition if else if age is equal to 18. 08:39.650 --> 08:43.580 Now here it is going to be true and this is what it is going to get displayed right. 08:43.580 --> 08:46.700 So here you can see you are a teenager right. 08:47.000 --> 08:52.130 So this actually gives you an idea how this Elif basically works. 08:52.130 --> 08:52.400 Right. 08:52.400 --> 08:55.010 And Elif allows you to check multiple conditions. 08:55.040 --> 09:02.350 Right now, there may be scenario where I really want to use nested conditional statement. 09:02.350 --> 09:05.170 And this is what we are going to discuss about okay. 09:05.200 --> 09:09.130 Nested conditional statements. 09:10.390 --> 09:14.620 Conditional statements right now nested conditional statement. 09:14.650 --> 09:17.230 What all things you can basically do okay. 09:18.130 --> 09:26.110 We can use the combination of if else if or else inside the block like let's say inside this if clause 09:26.110 --> 09:27.460 I can write another if clause. 09:27.490 --> 09:27.910 Right. 09:27.910 --> 09:31.150 So here let me just go ahead and write this particular comment for you. 09:31.180 --> 09:40.240 You can place one or more if Elif or else statement inside another if Elif or else statement to create 09:40.300 --> 09:41.980 a nested conditional statement. 09:42.010 --> 09:48.940 Okay, now let's say, uh, I will just give you some of the examples over here to make you understand, 09:49.090 --> 09:49.990 uh, what? 09:50.020 --> 09:55.750 Uh, like let's say I want to probably I will give you a number number. 09:55.840 --> 10:02.140 You need to tell me whether it is even or odd or negative. 10:02.170 --> 10:02.710 Okay. 10:02.860 --> 10:04.090 Something like this. 10:04.120 --> 10:05.770 These are my three conditions. 10:05.800 --> 10:06.250 Okay. 10:06.280 --> 10:07.900 Let's say I have given my number. 10:07.900 --> 10:10.210 So let me go ahead and write input. 10:10.540 --> 10:11.020 Okay. 10:11.020 --> 10:13.000 So first of all I will define my number. 10:13.030 --> 10:14.260 I will use int. 10:14.260 --> 10:16.360 And then here I'm going to use input. 10:16.360 --> 10:19.300 And here I'm going to probably say enter the number. 10:19.330 --> 10:19.780 Okay. 10:19.810 --> 10:21.760 I will go ahead and enter the number. 10:21.820 --> 10:26.560 Now my first condition will be that I will go ahead and check for positive and negative number. 10:26.560 --> 10:30.340 So if I go ahead and write if number is greater than or equal to zero, sorry. 10:30.340 --> 10:33.760 If it is greater than zero, then I can probably. 10:33.760 --> 10:35.530 Okay, let me just go ahead and write. 10:35.560 --> 10:37.960 Then I can probably go ahead and print. 10:38.110 --> 10:44.080 The number is the number is positive right. 10:44.080 --> 10:47.500 So here you will be able to see that I am printing this okay. 10:47.530 --> 10:51.790 Now the next condition is that I need to check whether this number is even or odd. 10:51.820 --> 10:52.150 Right. 10:52.180 --> 10:56.470 Now in order to probably check, I may write any numerical conditions over here. 10:56.500 --> 11:00.160 If number I mean I will try to use any operators. 11:00.160 --> 11:00.370 Right. 11:00.370 --> 11:02.490 If number Modulus of two. 11:02.520 --> 11:06.960 Modulus of two basically means if the remainder is equal to zero, that basically indicates that. 11:06.960 --> 11:09.000 Obviously this is an even number. 11:09.000 --> 11:15.780 So here I'm going to print the number is even right. 11:15.780 --> 11:21.360 So here you can see the number is even else I'm going to probably print. 11:23.130 --> 11:27.210 The number is odd okay. 11:27.210 --> 11:29.490 So here you can see what I have actually done. 11:29.490 --> 11:35.550 If this if this gets solved that basically means we are going to say that hey the number is even. 11:35.550 --> 11:40.170 But if this is not true, then it will go to the else block saying that the number is odd. 11:40.170 --> 11:44.040 So what is basically happening inside an if condition? 11:44.040 --> 11:46.740 I have written another if condition along with else block. 11:46.740 --> 11:52.140 So this is what nested nested uh nested uh conditional statement means. 11:52.140 --> 11:55.950 Right now there is also one more thing for this if block. 11:55.950 --> 11:57.450 Also for the outer if block. 11:57.450 --> 12:00.900 Also I can again write an else condition saying that else. 12:00.900 --> 12:03.120 And this time I will go ahead and print. 12:03.120 --> 12:08.070 The number is the number is negative okay. 12:08.820 --> 12:14.040 Or a better way will be that if I'm entering the number, I will just go ahead and write greater than 12:14.070 --> 12:14.670 zero. 12:14.700 --> 12:15.210 Okay. 12:15.240 --> 12:19.980 And here in the else condition I will go ahead and write is zero or negative. 12:20.010 --> 12:20.610 Okay. 12:20.910 --> 12:24.060 Now see this is what nested conditional statement means. 12:24.060 --> 12:29.400 You can place one or if else or if else or else if or. 12:29.400 --> 12:34.920 Sorry Elif this kind of statements within another if clause or Elif clause. 12:34.950 --> 12:39.420 Okay similarly you can write another Elif clause over here wherever you specifically want, but the 12:39.420 --> 12:41.310 order will be the same thing, right? 12:41.310 --> 12:45.540 You need to probably make sure that you manage all the indentation part. 12:45.570 --> 12:49.800 If you are not managing the indentation part, then you may get an error. 12:49.830 --> 12:52.230 Okay, so here you go over here. 12:52.230 --> 12:58.110 And now if I go ahead and execute this you'll be able to see it is asking for me for a number. 12:58.110 --> 13:01.500 If I go ahead and write 12 I'll go ahead and press enter. 13:01.500 --> 13:05.060 So here you can see the number is positive and number is also even. 13:05.090 --> 13:05.450 Okay. 13:05.480 --> 13:07.070 Now again let me just go ahead and execute. 13:07.070 --> 13:07.430 This time. 13:07.430 --> 13:11.900 If I give 11 you will be able to see number is positive but the number is odd. 13:11.930 --> 13:14.450 The else part has got executed over here. 13:14.480 --> 13:16.490 Now again if I go ahead and execute it. 13:16.490 --> 13:18.410 And if I go ahead and write minus one. 13:18.410 --> 13:23.180 So here you can see the number is zero or negative which is basically going to the else block. 13:23.180 --> 13:23.570 Right. 13:23.600 --> 13:25.160 Why this is going to the else block. 13:25.160 --> 13:27.110 Because I have given the number as minus one. 13:27.110 --> 13:31.460 Now this is going to be false and it is just going to jump to the else block. 13:31.460 --> 13:31.880 Right. 13:31.910 --> 13:36.680 So I hope you are able to understand this in a amazing way. 13:36.800 --> 13:40.880 Uh, you got an idea with respect to if else if else. 13:40.880 --> 13:44.870 And also you got an idea with respect to the nested conditional statement. 13:44.900 --> 13:48.500 Now let us see some very important use cases. 13:48.500 --> 13:54.560 And, uh, I'll just say that, uh, some practical examples that we are going to probably discuss. 13:54.590 --> 13:55.100 Okay. 13:55.130 --> 14:00.320 See, the errors can only happen when you are not doing the proper indentation over here. 14:00.320 --> 14:00.530 Right? 14:00.560 --> 14:05.240 If the indentation is basically done in a proper way, then you should be able to write this if else 14:05.240 --> 14:07.040 block in a very efficient way. 14:07.070 --> 14:11.090 Okay, now first practical example that I'm actually going to give you. 14:11.120 --> 14:11.690 Okay. 14:12.500 --> 14:19.310 You need to determine if a year is a leap year. 14:19.340 --> 14:21.140 What does leap year basically mean. 14:21.170 --> 14:23.570 Any year that is divided by four. 14:23.600 --> 14:27.920 If the remainder is zero, that that basically means it is a leap year. 14:27.950 --> 14:32.570 Using nested conditional statement. 14:32.600 --> 14:36.710 Now you can pause the video and you can start writing this right. 14:36.710 --> 14:41.660 And you can see what it will probably give you and what it will not give you. 14:41.690 --> 14:42.200 Okay. 14:42.230 --> 14:44.570 Now let me just go ahead and write this. 14:44.570 --> 14:47.060 So first of all, I will go ahead and write here. 14:47.060 --> 14:49.250 And I will give this as an input. 14:49.280 --> 14:49.820 Okay. 14:49.850 --> 14:52.550 And let me just go ahead and say enter the year. 14:52.580 --> 14:53.180 Okay. 14:53.780 --> 14:54.800 Enter the year. 14:54.980 --> 14:55.550 Okay. 14:55.970 --> 15:00.800 Now next thing if I will start my condition. 15:00.800 --> 15:07.680 If year modulus for right is double equal to zero right. 15:07.680 --> 15:10.200 So here see understand this particular condition. 15:10.200 --> 15:14.610 Also if your modulus for is equal to zero right then what I will do. 15:14.640 --> 15:15.000 See here. 15:15.000 --> 15:16.830 Also I can also write like this. 15:17.130 --> 15:23.430 If number percentile uh modulus two is equal to double equal to zero I have used one additional bracket. 15:23.430 --> 15:26.580 So let me just remove this if you are getting confused with this okay. 15:26.610 --> 15:32.370 If it is double equal to zero then I will also go ahead and put one more condition. 15:32.370 --> 15:36.930 If here modulo 100 is double equal to zero right. 15:36.960 --> 15:39.240 So here I have used two nested if else clause. 15:39.270 --> 15:39.870 Right. 15:39.870 --> 15:41.400 And if here. 15:43.410 --> 15:47.580 Uh modulus 400 double equal to zero okay. 15:47.610 --> 15:50.790 So see how many nested if else we have actually done. 15:50.820 --> 15:51.390 Okay. 15:51.420 --> 15:57.060 Now if this condition is basically if this all three condition is basically true, which is specifically 15:57.060 --> 16:02.380 for the leap year, what I'm actually going to do, I'm going to go ahead and write print This year. 16:02.380 --> 16:04.720 Whatever I've actually given, right? 16:04.720 --> 16:09.370 Whatever year I've actually given is a leap year. 16:09.400 --> 16:11.500 Okay is a leap year. 16:11.500 --> 16:14.350 So here is how I'm actually using the print statement. 16:14.380 --> 16:17.980 Okay, I will take one more session with respect to the print formatting. 16:18.010 --> 16:18.490 Okay. 16:18.520 --> 16:20.860 Are there different different ways of print formatting. 16:20.860 --> 16:22.300 So print year is a leap year. 16:22.330 --> 16:22.780 Okay. 16:22.810 --> 16:25.240 Then I will go ahead and write in the else block. 16:25.240 --> 16:26.980 What if this is not true. 16:27.010 --> 16:29.050 What if this two statements are true? 16:29.050 --> 16:30.550 But this is not true, right? 16:30.580 --> 16:32.380 Then I will go ahead and print. 16:32.410 --> 16:35.230 This year is not a leap year, right? 16:35.260 --> 16:39.910 The same year is not a leap year. 16:40.090 --> 16:40.660 Okay. 16:40.660 --> 16:43.120 So here you can probably see this okay. 16:43.150 --> 16:46.780 Then let's say fine for this. 16:46.810 --> 16:49.120 If if it is false I'm handling it over here. 16:49.120 --> 16:50.080 But what about this. 16:50.110 --> 16:53.110 If so for this we will write another else statement. 16:53.140 --> 16:53.680 Okay. 16:53.680 --> 17:01.150 And here I will also give one more condition saying that hey print year. 17:02.500 --> 17:10.180 And if this is also true, if your 100 model is 100 is equal to zero, I will be saying that hey, here 17:10.180 --> 17:11.530 is a leap year. 17:12.520 --> 17:14.920 Okay is a leap year. 17:15.340 --> 17:19.720 I'm just trying to write it in a complex if else condition. 17:19.720 --> 17:25.090 And finally, if this condition is also true in the else block, I will go ahead and basically go ahead 17:25.090 --> 17:29.200 and write print, print. 17:31.420 --> 17:32.380 Here. 17:35.380 --> 17:38.230 Is not a leap year okay. 17:38.260 --> 17:39.010 Done. 17:39.010 --> 17:44.440 So here you can basically see that if this condition is true then also we know that it is a leap year. 17:44.440 --> 17:47.170 So for that further conditions we are applying this one. 17:47.170 --> 17:49.120 Then again further we are applying this one. 17:49.120 --> 17:52.750 But if this is also not true then we also need to handle in the else block. 17:52.750 --> 17:55.060 Right now let me just go ahead and try it out. 17:55.060 --> 17:56.680 So here I'm just going to execute it. 17:56.680 --> 17:59.530 And let's say I go ahead and write 2022. 17:59.560 --> 18:04.210 Now obviously this will be uh, not a leap year, but let's execute this. 18:04.210 --> 18:07.390 And here you can see 2022 is not a leap year, right? 18:07.420 --> 18:09.160 If I go ahead and execute it again. 18:09.160 --> 18:11.350 So let's go ahead and see 2024. 18:11.380 --> 18:15.880 If I go ahead and execute over here 2024 is a leap year right now. 18:15.880 --> 18:18.760 So this is one of the good amazing practical example. 18:18.760 --> 18:22.960 Now what I'm going to do is that I'm going to give you more assignments as we go ahead. 18:22.990 --> 18:23.830 Right. 18:24.400 --> 18:28.690 Uh, we need to also understand what are the common errors and mistakes that we usually do. 18:28.690 --> 18:33.790 If you have not written colon, if the indentation part is not done properly, then obviously this will 18:33.790 --> 18:36.190 be a problem right now. 18:36.190 --> 18:41.650 Uh, let me give you some of the assignments, which you should definitely do. 18:41.680 --> 18:42.190 Okay. 18:42.220 --> 18:50.470 One is, uh, please try to create a simple calculator a simple calculator calculator. 18:50.560 --> 18:56.920 And inside this simple calculator program you need to take an input from the user, perform different 18:56.920 --> 19:03.300 different operations, what kind of operations you need to do if it is plus then by using if else condition, 19:03.300 --> 19:04.440 you really need to do it. 19:04.440 --> 19:06.810 So here I will just be. 19:06.840 --> 19:12.450 Please make sure that first of all, before I show you the solution, you try to write the code from 19:12.450 --> 19:12.870 your side. 19:12.900 --> 19:21.270 Okay, so here you can see, uh, I will just go ahead and update this just a second. 19:24.510 --> 19:25.200 Okay. 19:26.340 --> 19:29.190 So here you can probably see I have used float input. 19:29.190 --> 19:30.000 Enter the first number. 19:30.030 --> 19:35.280 Second number operation is either you can upload plus minus star or division. 19:35.280 --> 19:37.170 You can also use modulus if you want. 19:37.170 --> 19:38.970 And then I have written all this condition. 19:39.000 --> 19:40.170 It's operation is equal to plus. 19:40.170 --> 19:46.020 Then result num plus one this this this else you'll be also able to see the nested elsif is also there. 19:46.050 --> 19:48.960 Else if if number is not equal to zero right. 19:48.990 --> 19:50.190 Just go ahead and see this. 19:50.220 --> 19:53.700 Whatever things we have discussed till now, I think you should be able to understand it. 19:53.730 --> 19:54.150 Okay. 19:54.180 --> 19:55.920 So let me just go ahead and execute it. 19:55.920 --> 19:57.600 Let's say 12. 19:57.630 --> 20:00.120 I'll go ahead and press 24. 20:00.150 --> 20:01.560 I'll go ahead and press enter. 20:01.560 --> 20:03.710 And let's say I want to do plus operation. 20:03.710 --> 20:06.860 So here you can see 36.0 okay. 20:06.950 --> 20:08.930 So try to do this. 20:08.930 --> 20:12.830 Uh one more example that I really want to give it to you okay. 20:12.920 --> 20:16.550 Determine the ticket price based on the age. 20:17.270 --> 20:17.570 Okay. 20:17.600 --> 20:19.670 So this will be another one example. 20:19.670 --> 20:23.960 So I have multiple examples but definitely do try it from your side. 20:23.960 --> 20:28.280 So I'm just putting so that you will be able to practice it okay. 20:28.580 --> 20:30.650 So here you can see enter your age. 20:30.680 --> 20:31.400 Are you a student. 20:31.430 --> 20:32.150 Yes or no. 20:32.150 --> 20:37.850 So if you are probably saying yes then you will be seeing yes over here. 20:37.880 --> 20:39.680 So here are some of the condition. 20:39.680 --> 20:41.840 If age is less than five, price is free. 20:41.870 --> 20:46.850 Else if is age is less than 12, price is $10 if age is less than 17. 20:46.850 --> 20:50.300 And if the student if it is a student, then price is $12. 20:50.330 --> 20:54.350 Else if $15, then just try to go through this okay? 20:54.380 --> 20:56.780 And then you will be able to understand it. 20:56.780 --> 20:59.780 So I hope you were able to understand this video. 20:59.900 --> 21:01.160 This was it from my side. 21:01.160 --> 21:02.630 I will see you all in the next video. 21:02.660 --> 21:03.050 Thank you.