WEBVTT 00:01.400 --> 00:03.480 Okay, now you know how to use condition. 00:03.600 --> 00:07.240 Let's go, uh, learn loops. 00:07.360 --> 00:09.520 Okay, let's create a file. 00:09.680 --> 00:10.280 Loops. 00:10.280 --> 00:11.040 Dot py. 00:12.080 --> 00:15.840 And Python has two primitive loops. 00:15.840 --> 00:16.480 Command. 00:16.520 --> 00:16.920 Okay. 00:17.760 --> 00:19.360 One of them is while. 00:19.880 --> 00:21.520 Let me write that here while. 00:21.520 --> 00:23.320 And the next one is for. 00:24.120 --> 00:28.520 So we used a for loop before. 00:28.520 --> 00:35.680 And you know a little thing about for right now we are going to learn while loop now and for loop in 00:35.720 --> 00:37.040 the next lecture. 00:37.560 --> 00:46.360 So while loop with the while loop we can execute a set of statements as long as a condition is true. 00:47.120 --> 00:47.440 How? 00:47.800 --> 00:50.320 Let me give you a simple example here. 00:50.480 --> 00:51.120 Okay. 00:51.160 --> 00:56.640 Just imagine x or I is equal to a number which is one okay. 00:57.120 --> 01:02.240 Now let's use while here give a condition okay. 01:02.880 --> 01:12.260 For example right now I am printing uh this I as long as I is less than a number, for example ten. 01:12.300 --> 01:15.420 Okay, so I say I less than. 01:15.420 --> 01:17.540 Now you know how to use less than okay. 01:17.860 --> 01:19.900 Less than a number which is ten. 01:20.020 --> 01:21.020 Okay. 01:21.020 --> 01:25.220 In here let's print an I. 01:25.220 --> 01:32.100 And then in the next statement in the next line you need to increment I by one. 01:32.140 --> 01:32.820 Okay. 01:32.860 --> 01:34.220 So how can I do that. 01:34.300 --> 01:38.980 Very easy I say I plus equal to one. 01:39.140 --> 01:40.300 What is this mean? 01:40.460 --> 01:47.500 This means each time that this one is repeated, increment this I by one. 01:47.500 --> 01:48.180 Okay. 01:48.220 --> 01:52.180 Or we can do this in another way as well. 01:52.460 --> 01:55.300 I can say I plus. 01:57.340 --> 01:57.780 One. 01:57.820 --> 01:58.340 Okay. 01:58.380 --> 01:59.940 This is one way that we can do. 02:00.340 --> 02:05.460 And also this one is another way. 02:06.020 --> 02:08.660 Let's save it and run this program. 02:12.820 --> 02:19.160 Now you see it is giving me from one app to Two and nine. 02:19.200 --> 02:19.640 Okay. 02:20.160 --> 02:26.720 And here it's not giving me ten, because I am telling the condition that it needs to be less than ten. 02:26.760 --> 02:31.880 If I use less or equal, then it will give me number ten as well. 02:32.080 --> 02:37.480 So that is how you can use and how you can use while loop. 02:37.920 --> 02:44.920 And also we can use another statement that is called break statement. 02:44.920 --> 02:50.760 With the break statement we can stop the loop even if the while condition is true. 02:51.440 --> 02:53.400 So how. 02:53.400 --> 02:55.440 Let's go and see that as well. 02:55.920 --> 03:02.200 Right here inside this I can use an if condition before we learn something about if condition. 03:02.240 --> 03:05.280 Now you know what is that mean okay. 03:05.280 --> 03:12.640 If I is equal to three for example then let's break. 03:12.800 --> 03:13.600 Okay. 03:13.640 --> 03:20.520 While we are using if condition here, we need to give colon and be careful about this space okay. 03:20.560 --> 03:23.800 And right here let's use break statement. 03:23.960 --> 03:27.260 And now save this Execute this. 03:27.700 --> 03:31.380 And you see we have only three number here. 03:31.660 --> 03:31.980 Why? 03:32.020 --> 03:35.300 Because I used break statement right here. 03:35.460 --> 03:41.780 And also there is another statement that we can use with while loop that is called continue with the 03:41.780 --> 03:43.180 continue statement. 03:43.220 --> 03:48.020 We can stop the current iteration and continue with the next one. 03:48.380 --> 03:48.980 Okay. 03:49.020 --> 03:56.620 Right here instead of break right now if I use continue it will do something. 03:56.620 --> 03:57.220 Let's see. 03:57.940 --> 04:02.660 Continue and save this now. 04:03.900 --> 04:05.820 Actually not right in here. 04:07.460 --> 04:11.500 Let me remove this part and go from the beginning. 04:11.540 --> 04:12.820 Okay. 04:12.860 --> 04:13.940 Hit enter. 04:13.980 --> 04:19.220 Now let's say I is going to be incremented by one. 04:19.340 --> 04:27.300 And if this I is equal while we use two, equal means equality okay. 04:27.340 --> 04:30.300 But if I use one equal that means assigning. 04:30.620 --> 04:35.280 So if it is equal to three then let's say continue New. 04:35.280 --> 04:41.760 And here let's print this number which is I right now. 04:41.840 --> 04:43.960 It will start iterating okay. 04:44.000 --> 04:44.720 True. 04:44.720 --> 04:47.240 And checking for the if condition. 04:47.240 --> 04:50.200 And if this I is equal to three. 04:50.200 --> 04:56.920 So it will not print it and go for the next uh condition. 04:56.920 --> 04:57.440 Let's see. 04:58.880 --> 05:03.480 Right now we have one and we don't have one okay. 05:04.040 --> 05:06.400 We have two and then we have four. 05:06.800 --> 05:11.440 Let me change it to another number for example seven okay. 05:12.800 --> 05:14.120 Now let's see that. 05:16.600 --> 05:17.400 Okay. 05:17.440 --> 05:20.360 See we have 23456. 05:20.520 --> 05:23.040 And we don't have seven right in here okay. 05:23.080 --> 05:24.360 And then we have it. 05:24.360 --> 05:30.800 That is because of this continue keyword or continue statement. 05:31.440 --> 05:33.880 As you see here we use if condition. 05:33.880 --> 05:37.560 And also we can use else condition as well. 05:38.400 --> 05:40.000 And that is very easy okay. 05:40.000 --> 05:41.160 You know how to use it. 05:41.280 --> 05:44.280 So thanks for watching and I will see you in the next lecture.