1 00:00:02,220 --> 00:00:07,980 Let's talk about another method which is called the include. 2 00:00:08,640 --> 00:00:12,690 The include method is also crucial or is also important. 3 00:00:12,690 --> 00:00:16,379 So let me comment here and. 4 00:00:17,840 --> 00:00:21,950 As includes as that. 5 00:00:22,910 --> 00:00:23,790 Perfect. 6 00:00:23,810 --> 00:00:25,190 So what does it include? 7 00:00:25,190 --> 00:00:25,670 Method. 8 00:00:25,700 --> 00:00:32,150 They include method determines whether a string contains in a specified string. 9 00:00:32,270 --> 00:00:34,870 If it does, it returns true. 10 00:00:34,880 --> 00:00:37,040 Otherwise it returns false. 11 00:00:37,400 --> 00:00:39,230 So it takes two arguments. 12 00:00:39,230 --> 00:00:48,590 One is a text to search, and then two is a starting point, but by default is zero. 13 00:00:48,800 --> 00:00:56,960 And again, the enclosed methods is also case sensitive, meaning that if you pass in uppercase and 14 00:00:56,960 --> 00:01:01,000 you are searching for lowercase, it's always going to return false. 15 00:01:01,010 --> 00:01:02,930 So let's see in action. 16 00:01:03,290 --> 00:01:06,500 Let me declare a variable called. 17 00:01:07,830 --> 00:01:11,070 Strength for SDR is equal to. 18 00:01:12,100 --> 00:01:16,180 Are you a developer? 19 00:01:17,550 --> 00:01:22,820 Question I think I have declared the SDR, so let me comment out again. 20 00:01:22,840 --> 00:01:23,770 Yes, this one. 21 00:01:23,770 --> 00:01:25,930 So now I'll be free to use this variable. 22 00:01:26,410 --> 00:01:33,190 So for this one, let's check if you is in this particular string. 23 00:01:33,400 --> 00:01:39,790 So include is also very crucial or important for searching for this string. 24 00:01:40,240 --> 00:01:48,610 I want to check that if there is a letter U inside this particular string and it's possible to use the 25 00:01:48,610 --> 00:01:51,420 string dot includes method. 26 00:01:51,430 --> 00:01:53,830 I want to search for you. 27 00:01:54,830 --> 00:01:59,370 That's you insight or appears in this string. 28 00:01:59,390 --> 00:02:00,200 Yes. 29 00:02:00,200 --> 00:02:02,630 Because there is you inside here. 30 00:02:02,660 --> 00:02:04,990 Again, it's also case sensitive. 31 00:02:05,000 --> 00:02:07,100 So I pass in here as this. 32 00:02:07,490 --> 00:02:11,030 There is no letter that start with uppercase y. 33 00:02:11,180 --> 00:02:15,210 So let's assign the result of this one into a variable. 34 00:02:15,230 --> 00:02:18,140 Core result is equal to this. 35 00:02:18,350 --> 00:02:28,060 So if I console.log the result I have force because I told you includes is also case sensitive. 36 00:02:28,070 --> 00:02:33,820 So to make sure that you are you are saying what are passing in is always trying. 37 00:02:33,830 --> 00:02:39,380 We can turn this one to, let's say, uppercase or lowercase. 38 00:02:39,590 --> 00:02:40,920 For now, let's maintain it. 39 00:02:40,940 --> 00:02:44,510 So the key point here is that it is case sensitive. 40 00:02:44,540 --> 00:02:45,890 That's why we got false. 41 00:02:45,980 --> 00:02:53,000 The next thing is, bear in mind is that these include also take in second argument. 42 00:02:53,900 --> 00:02:58,370 If you provide zero, it means that you want to search the entire string. 43 00:02:58,490 --> 00:03:06,110 So by default is zero because we have zero here and then 1 to 3, right. 44 00:03:06,110 --> 00:03:10,190 Because y spacing is also being counted as a string. 45 00:03:10,580 --> 00:03:11,120 Okay. 46 00:03:11,120 --> 00:03:15,590 So let's say that I want to start searching from, let's say de here. 47 00:03:15,740 --> 00:03:22,550 So let's say zero one, two, three, four, five, six, seven, eight. 48 00:03:22,600 --> 00:03:23,240 Okay. 49 00:03:23,270 --> 00:03:28,280 So if I add it here, is this function going to return true or false? 50 00:03:28,310 --> 00:03:29,770 Going to be false, yes. 51 00:03:29,780 --> 00:03:37,070 You see, because a start from where here and we are searching for we are searching for you, which 52 00:03:37,070 --> 00:03:38,470 is not part of this string. 53 00:03:38,480 --> 00:03:41,920 So by default we normally bring zero or nothing at all. 54 00:03:41,930 --> 00:03:44,720 And indeed I got true. 55 00:03:45,080 --> 00:03:47,390 That is the include for you. 56 00:03:47,570 --> 00:03:53,450 Well, in the next video let's see our first coding challenge under include.