Would you like to inspect the original subtitles? These are the user uploaded subtitles that are being translated: 1 00:00:01,050 --> 00:00:05,430 Hello everyone and welcome to the art data types lecture and this lecture. 2 00:00:05,430 --> 00:00:10,260 We're just going to discuss some basic data types and our let's go ahead and get started by going to 3 00:00:10,260 --> 00:00:11,390 our studio. 4 00:00:11,790 --> 00:00:18,660 OK so here we are in our studio and let's go ahead and discuss some of the basic data types. 5 00:00:18,720 --> 00:00:26,010 The first data type is the numeric data type and the numeric data type consists of decimal otherwise 6 00:00:26,010 --> 00:00:28,530 known as floating point values. 7 00:00:28,530 --> 00:00:35,970 So for example 2.2 is a numeric and I can assign something like a 8 00:00:38,710 --> 00:00:40,640 2.2. 9 00:00:40,800 --> 00:00:46,320 So this floating point numbers are part of the numeric class in R and integers which are natural or 10 00:00:46,320 --> 00:00:52,960 whole numbers such as 5 or 7 are also part of the numeric class. 11 00:00:52,980 --> 00:00:59,270 So you have this overall numeric class and then you have decimals or floating point values and integers 12 00:00:59,280 --> 00:01:01,990 so those both fall under numeric class. 13 00:01:02,070 --> 00:01:10,770 The next one we have is the logical and the logical class consists of boolean values which is true or 14 00:01:10,770 --> 00:01:11,830 false. 15 00:01:11,880 --> 00:01:17,840 So an R These are written in all caps. 16 00:01:18,030 --> 00:01:25,950 So true or false or which you can also do is just in capital letters right t or death. 17 00:01:25,980 --> 00:01:30,170 So for example I can't assign a CBT. 18 00:01:30,810 --> 00:01:34,950 And you'll notice here it says a true. 19 00:01:34,950 --> 00:01:36,470 So that's a capital T. 20 00:01:36,520 --> 00:01:42,120 If I do a lowercase ill get confused and think that you're referring to lowercase t is some sort of 21 00:01:42,120 --> 00:01:42,630 function. 22 00:01:42,660 --> 00:01:43,910 So just keep that in mind. 23 00:01:44,160 --> 00:01:54,600 It should always be either just a capital true or a capital C and likewise a capital F or capital false 24 00:01:54,930 --> 00:01:56,890 so false in all caps. 25 00:01:57,060 --> 00:01:59,490 And those are known as logicals. 26 00:01:59,520 --> 00:02:04,680 OK so we've discussed numerics which are thus more floating point values or whole numbers. 27 00:02:04,680 --> 00:02:07,370 Now we have logicals which are true or false. 28 00:02:07,740 --> 00:02:11,160 And then we also have characters which are also known as strings. 29 00:02:11,280 --> 00:02:15,010 So texture string values are known as characters and are. 30 00:02:15,210 --> 00:02:19,590 And you can use quotation marks either double or single quotes to make a character string. 31 00:02:19,670 --> 00:02:21,660 Let me go in and show you how we can do that. 32 00:02:22,230 --> 00:02:29,010 So if I have something like hello and we've actually seen this sort of character string before we were 33 00:02:29,010 --> 00:02:30,310 printing them out. 34 00:02:30,510 --> 00:02:32,300 Hello world. 35 00:02:32,480 --> 00:02:33,320 There's my strain. 36 00:02:33,350 --> 00:02:36,480 I notice in the output you'll see double quotes here. 37 00:02:36,510 --> 00:02:40,500 That doesn't mean anything it just means that this is a string. 38 00:02:40,500 --> 00:02:44,660 Ok so you can use either single quotes or double quotes for strings. 39 00:02:44,670 --> 00:02:47,940 Let me go ahead and show simple example. 40 00:02:48,000 --> 00:02:55,740 We'll say is hello and then we'll also in double quotes we can say hello. 41 00:02:55,950 --> 00:03:01,050 I encourage you to use double quotes because that's more common by convention but you can feel fine 42 00:03:01,050 --> 00:03:03,210 using single quotes Assos work as well. 43 00:03:03,570 --> 00:03:07,070 But again I would encourage the use of double quotes. 44 00:03:07,090 --> 00:03:14,100 OK so let's say you have some sort of variable here we have variables A and B and you want to know what 45 00:03:14,100 --> 00:03:19,260 data type they or you can use the class function to check the data type variable. 46 00:03:19,470 --> 00:03:24,000 Later on we're going to learn a lot more about functions that had a constructor own functions buffering 47 00:03:24,020 --> 00:03:24,110 . 48 00:03:24,150 --> 00:03:28,920 Now you can think of a function as just having a name. 49 00:03:28,920 --> 00:03:32,800 And here you can start seeing our studios built in help. 50 00:03:32,880 --> 00:03:39,630 So our position is the simple generic function mechanism and it's going to be used to basically return 51 00:03:40,140 --> 00:03:44,400 whatever data type class A variable is. 52 00:03:44,400 --> 00:03:47,450 So for example we have a and we know it's hello. 53 00:03:47,670 --> 00:03:54,810 So if I pass a into this class function so the function is the name and then to print CS and you add 54 00:03:54,810 --> 00:03:59,640 an arguments inside of the predecease it's going to return what class it is. 55 00:03:59,640 --> 00:04:08,430 So this is a character class and it's going to be the same for B also at character class so those text 56 00:04:08,550 --> 00:04:14,970 string values are known as character classes and we can go ahead and check the classes of other things 57 00:04:14,970 --> 00:04:22,440 so let's say 12 that's a numeric and we can check the class of 3 2.2. 58 00:04:22,440 --> 00:04:23,760 That's also numeric. 59 00:04:23,760 --> 00:04:29,430 So even though a 12 is an integer and 3 2.2 is a floating point or decimal number those both fall under 60 00:04:29,430 --> 00:04:31,720 the numeric data type class. 61 00:04:31,950 --> 00:04:38,040 And then finally we can go ahead and affirm that true is a logical and these are also sometimes known 62 00:04:38,040 --> 00:04:44,100 as boolean values and we can do the same for f which stands for false. 63 00:04:44,100 --> 00:04:47,260 MEMBER It's capital F and that's also logical. 64 00:04:47,510 --> 00:04:53,430 OK so those are just some of the basic data types and are later on we're going to use these basic data 65 00:04:53,430 --> 00:05:00,460 types to build on top of them as building blocks as we learn more about data structures in our. 66 00:05:00,750 --> 00:05:04,910 And one of the most common ones we're going to learn about next is called the vector. 67 00:05:05,190 --> 00:05:05,580 OK. 68 00:05:05,670 --> 00:05:07,350 So you should have gone out of this lecture. 69 00:05:07,380 --> 00:05:14,670 It's just how to check data type classes using the class function here and the three main data types 70 00:05:14,670 --> 00:05:15,840 that we're concerned with right now. 71 00:05:15,870 --> 00:05:20,100 The basic ones which are numerics which consists of decimals and integers. 72 00:05:20,310 --> 00:05:25,000 Logicals which are those boolean true and false values and then characters which are those text and 73 00:05:25,050 --> 00:05:26,280 string values. 74 00:05:26,550 --> 00:05:28,620 Ok that's it for this lecture. 75 00:05:28,620 --> 00:05:30,890 Thanks everyone and I'll see you at the next one. 7778