1 00:00:08,000 --> 00:00:09,140 In this video. 2 00:00:09,170 --> 00:00:12,520 Let's explain what is API. 3 00:00:12,530 --> 00:00:14,480 So let's get started. 4 00:00:15,020 --> 00:00:21,550 Well, API stands for application programming interface. 5 00:00:21,560 --> 00:00:23,600 So what does it mean? 6 00:00:23,690 --> 00:00:26,660 We will explore more as we move on. 7 00:00:26,930 --> 00:00:34,940 The next point is that it is a set of functions that allow you to access data from a server. 8 00:00:35,270 --> 00:00:39,980 Do you remember this project called Making HTTP requests? 9 00:00:40,160 --> 00:00:48,540 But as soon as I click fetch post, you can see that I'm able to fetch a post from a different server. 10 00:00:48,560 --> 00:00:54,560 This data is not from our application but instead from a different server. 11 00:00:54,680 --> 00:01:01,670 That's why it says that it is a set of functions that allow you to access data from a server. 12 00:01:02,000 --> 00:01:10,160 The next point is that it's allow many different kinds of applications to access data from a server. 13 00:01:10,430 --> 00:01:20,390 Remember, we are using an API to develop this application and I named my eyes at HTTP request application. 14 00:01:20,810 --> 00:01:29,570 A different developer might use the same API or data and describe his or her projects as latest post 15 00:01:29,570 --> 00:01:30,440 project. 16 00:01:30,470 --> 00:01:37,130 So it means that with one API, many applications can be built out of it. 17 00:01:37,430 --> 00:01:46,020 And the next point is that API allows you to create your own applications for a different application. 18 00:01:46,040 --> 00:01:48,470 So what does this point mean? 19 00:01:48,500 --> 00:01:55,580 That is why I say that with a certain API that has been developed by a different party or different 20 00:01:55,580 --> 00:02:03,440 developer, we can create our own application on top of it and we can create many applications like 21 00:02:03,440 --> 00:02:11,090 whether application or booking application and many more using third party APIs. 22 00:02:11,330 --> 00:02:18,590 And next point is that it creates a connection between two or more applications. 23 00:02:18,590 --> 00:02:20,480 And indeed it is, right? 24 00:02:20,630 --> 00:02:28,640 Let's say that this is our front end application that we have designed with CSS, JavaScript and HTML. 25 00:02:28,940 --> 00:02:36,770 And for this data that we got here, this data is coming from a back end server being developed by a 26 00:02:36,770 --> 00:02:40,150 different party or us who has developed this. 27 00:02:40,160 --> 00:02:48,170 So it creates a connection between our front end and then the back end data for a certain server. 28 00:02:48,530 --> 00:02:56,510 The next point is that API is like a waitress that waits for a request from a client. 29 00:02:56,540 --> 00:03:00,370 For this point we will explore more with diagram. 30 00:03:00,380 --> 00:03:02,750 So now let's move on. 31 00:03:03,440 --> 00:03:06,500 So let's talk more about API. 32 00:03:06,650 --> 00:03:13,700 Let's say that this is the API that we have developed or it has been developed by a different party 33 00:03:13,700 --> 00:03:14,810 like Google. 34 00:03:15,110 --> 00:03:24,050 Google has many API, for example, translation API, geolocation API, mapping API, YouTube API and 35 00:03:24,050 --> 00:03:24,920 many more. 36 00:03:25,430 --> 00:03:33,500 So let's say that this API is for Google and for this many applications can interact with it. 37 00:03:33,890 --> 00:03:40,520 One developer can say that, well, for me, I want to develop a translation application using the Google 38 00:03:40,550 --> 00:03:42,380 API in this way. 39 00:03:42,410 --> 00:03:47,570 One application is making a connection to the API. 40 00:03:47,780 --> 00:03:49,160 And the same point. 41 00:03:49,160 --> 00:03:55,100 We can have many applications coming in the mix by using this API. 42 00:03:55,580 --> 00:04:03,580 So you can see that many devices are now interacting with the same API to develop different applications 43 00:04:03,590 --> 00:04:07,310 and this is possible because of the API. 44 00:04:07,340 --> 00:04:10,340 So what is API in a nutshell? 45 00:04:10,370 --> 00:04:16,810 So let's say that this developer has no experience how to create API. 46 00:04:17,060 --> 00:04:23,980 Even if he has some experience, he cannot develop the entire translation API. 47 00:04:23,990 --> 00:04:25,030 In this way. 48 00:04:25,040 --> 00:04:27,300 He needs to seek for help. 49 00:04:27,320 --> 00:04:30,740 That is why he needs a third party API. 50 00:04:30,770 --> 00:04:35,600 In this way we are going to use what is called Google API. 51 00:04:35,630 --> 00:04:40,850 And for google they have a bunch of API like translation API. 52 00:04:40,910 --> 00:04:46,040 Now we have the developer or the front end and then the API. 53 00:04:46,190 --> 00:04:50,780 So definitely the developer will talk to what the Google API. 54 00:04:50,810 --> 00:04:53,090 So now let's see how it's work. 55 00:04:53,120 --> 00:04:57,970 That's why we say that API stands for application programming interface. 56 00:04:57,980 --> 00:05:06,860 So what make it possible for a different application to access external server is what we call the API. 57 00:05:07,370 --> 00:05:11,270 So we regard the waitress here as an API. 58 00:05:11,300 --> 00:05:14,210 Meaning the waitress would be sitting somewhere. 59 00:05:14,240 --> 00:05:22,820 So any time a request comes in to a server, the waitress will take that data and then send to the user. 60 00:05:23,180 --> 00:05:30,710 Then when a user wants to make a request again, the waitress will now take the data and sent to the 61 00:05:30,710 --> 00:05:31,820 server again. 62 00:05:31,850 --> 00:05:35,670 So that's how the API works in a nutshell. 63 00:05:35,690 --> 00:05:41,310 So the waitress is between the developer here and then the actual server. 64 00:05:41,330 --> 00:05:43,220 So it goes back and forth. 65 00:05:43,250 --> 00:05:43,820 Right. 66 00:05:43,820 --> 00:05:46,730 So that's what API is all about. 67 00:05:46,760 --> 00:05:52,380 So for this one, as soon as we make a request, we can see that something is happening. 68 00:05:52,400 --> 00:05:59,750 So the function that happens to get back this data is what we call the API. 69 00:05:59,780 --> 00:06:07,040 So the next video we will explore how we can make use of what APIs in the next video.