WEBVTT 00:00.080 --> 00:01.040 Welcome back. 00:01.080 --> 00:03.800 In this video we're going to learn about lists. 00:03.840 --> 00:06.880 A list is an ordered collection of items. 00:07.040 --> 00:10.560 You can add, remove and access items in it. 00:10.600 --> 00:12.360 In order to create a list. 00:12.400 --> 00:18.520 Create a new variable equals sign and use this angled bracket. 00:18.680 --> 00:24.680 Inside this angled bracket, place the items you want to store inside it, separated by comma. 00:24.800 --> 00:28.360 So for example, here we have a list called fruits. 00:28.640 --> 00:33.760 This fruits list contains apple, banana, and cherry items. 00:33.880 --> 00:41.160 In order to print this list, we use print and name the list run. 00:41.360 --> 00:42.160 And here we go! 00:42.360 --> 00:42.760 Apple. 00:42.800 --> 00:43.360 Banana. 00:43.360 --> 00:43.920 Cherry. 00:43.960 --> 00:51.080 In order to access items by index, we start by starting from zero, one, and two. 00:51.280 --> 00:54.480 The first fruit, which is apple. 00:54.520 --> 00:56.520 We use the index zero. 00:56.560 --> 01:03.000 If we need to access the last fruit, we need to use negative one. 01:03.040 --> 01:06.000 Negative index equals from end. 01:06.040 --> 01:13.360 For example let me access the second fruit which is fruits one. 01:13.400 --> 01:15.600 Here I am specifying the index. 01:15.960 --> 01:17.880 The second fruit is banana. 01:18.000 --> 01:21.320 Let me access the third index. 01:21.440 --> 01:24.040 So print third fruit. 01:24.040 --> 01:26.440 And you notice that the fruits. 01:26.720 --> 01:32.920 And here I'm specifying the index inside the angled bracket run again. 01:32.960 --> 01:35.160 The third fruit is cherry. 01:35.200 --> 01:42.120 So in arrays and in lists the starting index is zero and not one. 01:42.120 --> 01:45.320 This is a very important thing okay. 01:45.480 --> 01:56.160 In order to get the length of the array or a list, we start with print length of list and we use the 01:56.160 --> 02:05.360 Len function run again and the length of list is equal to three because we can because the fruits array 02:05.400 --> 02:10.000 contains three elements apple, banana, and cherry. 02:10.040 --> 02:15.120 The length of an array is always one more than the highest array index. 02:15.160 --> 02:16.760 It's very simple guys. 02:16.760 --> 02:20.800 We created this list containing three elements. 02:20.840 --> 02:21.120 Apple. 02:21.160 --> 02:21.640 Banana. 02:21.640 --> 02:22.160 Cherry. 02:22.510 --> 02:23.510 printing the. 02:23.550 --> 02:24.950 And the list. 02:24.990 --> 02:25.390 Uh. 02:25.590 --> 02:34.790 Accessing the list and accessing the items of the list by index and getting the length of a list. 02:34.830 --> 02:44.150 Now, if we need to modify, add or remove the items fruits at index one, change the item at index 02:44.190 --> 02:44.670 one. 02:44.830 --> 02:45.910 Index one. 02:45.950 --> 02:46.950 This is zero. 02:46.990 --> 02:50.230 This is one I need to change banana to orange. 02:50.510 --> 02:52.590 So let me run again. 02:52.590 --> 03:00.950 And here the first output is apple orange and the charity banana is replaced by orange. 03:00.950 --> 03:03.950 Here I'm accessing the element. 03:03.950 --> 03:09.710 I am accessing the element by specifying the name of the array. 03:09.710 --> 03:17.470 And inside the angled bracket we specify the index and you change it by using the equals sign. 03:17.470 --> 03:19.110 If we need to append. 03:19.110 --> 03:24.990 If we need to add at the end, we need to add date for example. 03:24.990 --> 03:28.750 So apple, orange, cherry and date. 03:28.750 --> 03:36.870 If we need to remove we use fruits dot Remove and remove the orange by the value, or you can remove 03:36.870 --> 03:40.950 it by the index, but I prefer using by the value. 03:40.950 --> 03:44.790 So Apple, charity and date orange is removed. 03:44.790 --> 03:53.430 So in this way we can access, change and append and remove elements inside a list. 03:53.430 --> 04:02.030 Also, we can loop through a list by specifying for every fruit in fruits, go and print the fruit, 04:02.070 --> 04:04.830 fruit, apple, fruit, cherry and fruit. 04:04.870 --> 04:05.550 Date. 04:05.590 --> 04:13.950 This is after the modification because the last updated list is this apple, cherry and date for every 04:13.990 --> 04:14.790 item. 04:14.790 --> 04:23.990 For every fruit inside this fruits element and this fruits array, go and print all the elements and 04:23.990 --> 04:35.310 print fruit and specify the value of the element Apple, cherry and date okay so this is the basic creation 04:35.310 --> 04:36.830 of lists. 04:36.950 --> 04:44.630 How to access, how to modify, append and remove elements, and how to loop through a list in Python.