WEBVTT 00:01.260 --> 00:06.900 Hell, everyone, so in this particular session, we would learn about string slicing and indexing, 00:07.230 --> 00:14.700 so would see how we can retrieve a particular word or a subset of a word using indexing. 00:15.060 --> 00:18.630 So let's I want to get the intent of the word. 00:18.630 --> 00:28.380 I can get that by using land function and applying it on X. So we can see that the length of X is 17 00:28.380 --> 00:29.040 characters. 00:29.280 --> 00:36.750 If I want to retrieve the first character, it would be retrieved by X zero, which is the first index, 00:36.920 --> 00:40.900 the zeroth index, so zero, the Nexus X.. 00:41.430 --> 00:45.260 So if I go to one, it is any. 00:47.740 --> 00:53.680 If you go to three, this is L and if you go to 17. 00:55.230 --> 01:04.620 It is because the length of the wood goes from zero to next to 16 Pantex and the length is 17 characters, 01:04.830 --> 01:06.540 so it will go only to 16. 01:07.710 --> 01:12.780 Now, if I want to see the entire world, I can simply see it using X. 01:13.560 --> 01:23.100 Now, if I want to retrieve, let's say, a word from third character to fourth character so I can do 01:23.100 --> 01:25.950 it by using three. 01:27.060 --> 01:32.480 And no to do it, so it gives me an old space deal. 01:32.660 --> 01:35.510 Now, how do we really check if this is correct or not? 01:35.820 --> 01:39.480 So I'm going from third character. 01:39.930 --> 01:42.600 And when I say I want to see this. 01:43.940 --> 01:51.270 To eat this means that I want to see three, four, five, six and seven characters. 01:51.440 --> 01:53.300 I don't want to see the eight character. 01:54.820 --> 01:59.110 So we are going from three, the third character to the. 02:00.490 --> 02:03.290 Eight one, so it is actually well. 02:04.360 --> 02:12.530 So that's why I am able to see a little space now in case I want to retrieve from, let's say, 30 and 02:12.570 --> 02:16.690 I want to see in the old space the east. 02:17.050 --> 02:18.630 And I don't want to see the space. 02:18.640 --> 02:19.960 I want to see the edge. 02:20.470 --> 02:28.060 Then I would slice it from six to 12 so that I am able to see data from six to 11. 02:29.650 --> 02:37.620 So I'll take it from six and see to it so you can see it goes from space. 02:39.400 --> 02:43.850 Now in case I want to view now, this is a positive direction. 02:44.140 --> 02:49.390 Now, if I want to go from person next to last index, if I want to see the whole data. 02:50.850 --> 03:00.030 I can either simply say X or I can also say X colon, this will mean that I want to start from the very 03:00.030 --> 03:01.650 beginning and go to the very end. 03:03.070 --> 03:09.880 Now, in case I want to see a specific Galleguillos, I want to see the character, then it will show 03:10.300 --> 03:11.190 the character. 03:11.500 --> 03:17.920 Let's say I want to start from second character and I want to give you till the end I can do something 03:17.920 --> 03:18.580 like this. 03:19.270 --> 03:21.730 So it will start from the second character and go to the. 03:22.970 --> 03:31.070 Now, another thing, what I can do is let's say I want to start from edge and I literally want to start 03:31.070 --> 03:34.640 from E, you want to start from E and we want to skip. 03:35.430 --> 03:42.570 One character in between, so we want to see index one, then index three, then index five, then index 03:42.570 --> 03:46.250 seven, then index nine, then index eleven. 03:46.530 --> 03:48.490 Let's say we want to do something like that. 03:48.720 --> 03:54.330 So in that case, we will have to do a subset from one. 03:55.240 --> 03:57.670 Index one to 12. 03:58.430 --> 04:04.040 And we will skip one character in between, so we'll go from. 04:05.260 --> 04:14.470 X one and will go to 11 and we go to 12 here and we want to skip one Galactus, so if we don't want 04:14.470 --> 04:17.210 to skip any character, then we don't not give anything here. 04:17.560 --> 04:22.930 This would mean that we want to see everything now in case I want to skip one more character if I give 04:22.930 --> 04:24.340 a default value one. 04:25.860 --> 04:31.250 This is of equal value one here, so if I give a default value one, it will give me just the same thing. 04:31.470 --> 04:34.180 Now, in case I want to skip one character in between. 04:34.440 --> 04:37.880 I can give one here actually to here. 04:38.130 --> 04:39.690 Then it will skip one character. 04:39.960 --> 04:46.320 Now, in case I want to skip two characters in between so I can give three and it will skip three characters 04:46.320 --> 04:46.830 in between. 04:47.220 --> 04:49.770 So you'll have to experiment this a little bit. 04:50.010 --> 04:54.930 Now what we are simply doing is we are giving the starting point and we are giving the ending point. 04:55.410 --> 04:58.050 And in between we want to skip the character. 04:58.050 --> 05:00.480 So we will see then all. 05:01.930 --> 05:02.640 Then, oh. 05:06.970 --> 05:07.990 Then it's. 05:09.210 --> 05:10.020 Then W. 05:11.360 --> 05:17.720 And then and then so we go from zero to 16. 05:22.020 --> 05:27.960 And then we skipped three values, so that's what we see here, if I begin with one. 05:29.840 --> 05:32.150 You see the data which we've just discussed. 05:32.970 --> 05:37.800 Now, this is in the positive direction, but we do have negative Badakshan indexing also. 05:38.060 --> 05:40.250 So if I do something like this. 05:43.900 --> 05:48.160 Minus one, it was simply the most extreme for me, so the string has been. 05:48.910 --> 05:53.530 Now, if you want to view data in a negative direction, you can use negative indexing. 05:53.740 --> 05:59.050 And for that, you will have to begin from the right side and go to the left side. 05:59.050 --> 06:02.590 To the indexing would also go from live from right to left. 06:02.950 --> 06:07.870 So let's say we want to begin from minus two and we want to go to 60. 06:09.660 --> 06:11.040 So we'll see X. 06:13.210 --> 06:13.950 Minus two. 06:14.710 --> 06:20.960 We are going down in minus 16 and we don't want to skip anything, so we'll just give minus one here. 06:22.150 --> 06:24.400 So this goes in the negative direction. 06:25.590 --> 06:32.160 And if I don't give anything to you, then it would not give anything because it doesn't really understand 06:32.160 --> 06:32.480 that. 06:32.790 --> 06:37.070 So we'll have to give a negative one to you and it will show the values. 06:37.080 --> 06:40.680 If you give one, then it will not really understand what we are trying to do. 06:40.680 --> 06:42.650 So we don't just give nothing you. 06:43.170 --> 06:49.590 So that is how a negative indexing and string slicing work and you can try at the end, you can create 06:49.590 --> 06:55.380 a string and then trying different permutations and combinations and see how slicing works. 06:55.770 --> 06:56.250 Thank you.