JavaScript is an amazing language that allows you to create powerful web applications. If in today's date you do not know JavaScript So hardly you guys can become a successful web developer On the other hand, if you guys have mastered JavaScript if you people have become a master of JavaScript then you guys can become a very successful web developer. And you guys will be able to do that work, which other people do very hard, very easily.
In this course, with Handwritten notes, Source code and many more resources, we will learn JavaScript from starting to end, I'm here for you guys to make things a lot easier Request from you people: Like this video, write on the comment below "This JavaScript course is helpful" Our first video will be. Intro to programming, in which I will introduce you to programming. And many of you, Perhaps Introduction to programming, would not have been expected in JavaScript course.
But the fun of learning somewhere from scratch is something else. We'll start with the basics and then will raise the bar like anything I can assure you, this JavaScript course is going to be game changing for many of you career. This is the ultimate JavaScript course Let's get started So guys I'm in my computer screen as you guys can see And here I would like to introduce you guys from PDF, which I have created for you people.
Here you will find all the notes: Inside this course So let me start from introduction to programming. Programming is a way to talk to a computer If you have never done programming in your life so let me tell you guys that in Hindi, in English, in Bengali, in Spanish, in Japanese, or in Chinese The way we talk to others: In the same way, to talk to the computer, we have to adopt a method, and this method is called programming. We call this protocol as a programming I hope you guys understand what programming is What is a computer, it is a very dumb machine And if you ask him to do any work, he will not do it.
Like if you tell the computer that man, make a tea and bring it will you have tea? will not get it if i say to my computer to recharge my phone, some cheap one Will he understand! , he will never understand Say do recharge of 310, even then you will not understand Okay So you have to tell the computer very clearly straight forward, do this, do it like this, okay add (1 + 2), then the computer will do If you want to get any work done using any application, from computer then it will do it Like if I write here 45 + 8 = so 53, it told me Here which application it used, Chrome Because all the logic of has been written, It knows what to do: Inside it.
See, if I tell him to make tea, then make tea, he does not know That's why I called the computer dumb over here, okay Suppose you tell someone that man, I am very hungry, bring some cereals to eat. and he brings you a DVD of a serial and gives it to you. So what would you say I wanted to ate cereals, I didn't want this DVD Don't want to see a little bit: mother-in-law, daughter-in-law Balika Vadhu or else Ghar-Ghar ki kahani or else Kasauti zindagi ki You got the point, Okay.
So if someone brings you the DVD of that serial, then you will tell him only that don't get my mind worse Already my mind is getting worse, I am feeling hungry here. Bring me cereal to eat, not the DVD of this serial. So in this way, if you speak anything to the computer, it will not work for you.
Because computer is a dumb machine: I already told you This is what I wrote in the notes: Programming is the act of constructing a program a set of precise structure telling a computer what to do. You have to clearly tell the computer to do this, do it like this and it will do your job If the computer is dumb then why should the computer do it? why don't you pick it up and throw it away?
Do not throw it because some work is such that computer can do faster than human. Can't do it smarter than a human, can do faster than humans We do it because of speed, we can do it because of accuracy we can use the computer. Because if you tell to which person, how much would (4 + 3) be: Maybe once tell you 6, but computer will never tell you 6, given that you have programmed it correctly.
It is not that you are asking the computer 3 times, how much would (4 + 3) be: it would tell you 7 And the fourth time by telling you 10, put you in the dark. Computer is very loyal, ok Now let's talk about the ECMA Script here And then I will tell you people, how will we execute JavaScript ECMA Script A Standard: Of JavaScript That is, anytime you write about JavaScript, or add something to it. Let us say You think this language:, want to add in, a feature (x), ok So you would add in ECMA script, which is a standard: JavaScript that follows Let me tell you a little history about this thing.
It happened in the first 90's, late 90's, when JavaScript was being developed When this happened, when a lot of people were working on different features of JavaScript. Somebody was saying that add this thing in JavaScript, some one was saying add that thing in JavaScript there was no one standard That's why ECMA Script was made a standard. Whatever things are added, it should not happen that my JavaScript is running separately, your JavaScript is running separately.
If I have made a browser then your JavaScript is not running in my browser You have made a browser, so your JavaScript is not in me, mine is not in you, we do not want all these things We need a standard here, which everyone will follow, do well to follow And we 'll understand what's going on, Okay. So that's why we made ECMA Script a standard If anyone ever tells you, Ecma Script So you can use interchangeably JavaScript and ECMA script. In almost, all the cases, Okay.
After this wrote a line: I have here JavaScript is very liberal in what it allows That is, JavaScript allows you Doing almost anything. will never throw an error, when there is too much limit when it is seen throwing an error JavaScript Do not put semicolon (;), will not throw error JavaScript will always try to do something, which autocorrects the code you have written, and throws the least error. So that's why JavaScript is called Liberal here.
So now i scroll down why is it not scrolling my computer hangs Someone: call a municipality I don't know what happened, I had to plug it back out of the mouse, after that it worked so let's talk now how to execute JavaScript See, there are several ways to execute JavaScript: You can execute JavaScript inside the browser. Whenever you visit the website such as a website like Facebook, Or if you also look on Google And then you, I will give an example of a good website. You look at Twitter, ok So the content you have there changes.
and changes happen without reloading we can talk on WhatsApp web You sent a message to a friend on WhatsApp Web, and the message has come to you You didn't need to reload the page What is all this? it's all JavaScript I don't know my friend what do you keep messaging Songs, Identification card, PAN card, Marksheet I don't know what keep messaging me in WhatsApp I say what's going on He says he wants to transfer to computer i say i only get you to transfer, send me everything So people do it, okay So we use JavaScript to create interactive web applications. And one of the best, easy and clear way to execute JavaScript, straight forward way is browser.
Like if I open new here then right click and inspect Go to console, here I'll write console. log("Hello") and I'll say "Hello", ok Let me write "Hello World" hit enter to see "Hello World" printed here Now I will explain this JavaScript, what is written What is console, what is console. log What kind of functions are there in JavaScript, what are they I will tell you all this, so don't be confused: what are all, if you are a programming beginner So overall by opening new then right clicking, inspecting you can execute JavaScript So this is the birth right of all of you people: Okay, Now another way to execute JavaScript copy, use a runtime like node Js, what is node Js What did someone do, which is the engine inside the browser, which was the v8 engine, put it inside a C# program.
So that JavaScript can be run outside browser This person's name was Ryan Dahl, and he did this work. in order to execute JavaScript in order to CWT of JavaScript outside of the browser That's why he worked And they got a lot of success by doing this work. People appreciated his program very much and call it JavaScript runtime Node JS as you all can install inside your computer and run JavaScript code Another way is to execute JavaScript You can put script tag inside Html You can put script tags inside the Html document.
And there you guys, when you execute the HTML page, you will see the JavaScript being executed But I will tell you another way to execute JavaScript here. and that is Replit, Okay. Replit What is replit now?
i tell you guys If you guys are associated with this channel, then you people would probably know. that what is replit? Replit Basically is a very powerful platform: through which we can run JavaScript.
If you guys have phone etc. , overall you can run JavaScript here I will tell you the code, it will be easy Simultaneously if you people do not have a laptop, some people do not have them. Those people can also execute JavaScript on the phone They don't need any fancy laptop, phone, that means powerful phone.
You can run from normal to phone, if you want, JavaScript so what i will do here, i will show you guys how replit works You can make a repl in this So look at this, I made all these repls: It's my private repl, okay I won't show it to you Now this is something I made a public repls: which I wrote the code, to give to you people, ok So all these repls are made But for the sake of this course, which I'm going to make a repls for. I will create a folder for that And I'll name it, Ultimate JavaScript Course - CodeWithHarry Okay And here I will click on create folder And after clicking on Create Folder, you will see a folder has been created here Ultimate JavaScript Course - CodeWithHarry So in this way you people can organize in folders Now I can make a new repl inside it Okay So here I will name this repl 01 0, is not even 01 00 will give I search here the template of JavaScript JavaScript, Okay. And here for the JavaScript, I'll just use the latest with node Js, Now what is the node Js: I have already told you people So I'll name it, 00_Introduction_to_Js Okay And this would be the name of my file, i.
e. the title of the repl And I'll click on create a repl, obviously, it will be public, so that all of you people get the code that I am going to write And you guys see here, it's loading all the files And if I write here, console. log("Hello World") and then run this repl So you guys look over here, Hello World I see Okay!
Now here you see, I will show you one thing. This replit's feature: I will right click here, and after right click I will click on generate code And suppose I write here write a program to add three numbers and i click on generate This is not a feature of JavaScript, it is a feature of Replit: I will tell you guys. I just want to tell you people how you guys can do this kind of work.
So also the advanced features of Replit: Like I showed you here But we will walk slowly, I do not want to sin more by showing all this to you people now. This is a function: in JavaScript I'll tell you what the function is, in JavaScript Don't you think that in the first video the function was written, not even told what happens Simply want to write some code and want to show you people how powerful JavaScript is: This is the code to add three numbers: Okay! And if I write here, let c = I am going to assume that you do not understand this code.
Okay But we will understand in the coming time that what would have happened to this thing. I just want to show you by writing some code And I want to familiarize you guys with replit Look if I run it, it is printing 57 It added three numbers, okay What is console. log, what is function keyword, What did we do Why this bracket was put, why did it do this, it was done like this, you will know all this in the upcoming video Now just do a copy, do copy-paste And don't tell me that I don't copy-paste Know you guys who: in exams I know know all So that was all about just video, i hope you guys had fun I'll do one thing, make a playlist of JavaScript course so that you guys will get to know better When are all the videos being uploaded You will get to see all the videos in one place.
So I'll make a playlist And in replit, I have also made a playlist here regarding the JavaScript course And for you guys which is Simply, Ultimate JavaScript Course Accessing This Folder, Will Keep Putting It In, Videos From The Series You guys have access to all the repls I will also put the repl link in the description As I write the program, I will give you the link of repl And here I am to improve this program a little bit. I write This program adds three numbers Okay don't adds three numbers, adds 1, 2 and 54, Okay So I have taken a very simple program, which adds three numbers. I know, will it feel, this thing is not making any sense But in the coming videos we will write such programs.
Which you will enjoy seeing, and "WOW" will come out of your mouth So with that said, I conclude this video see you in upcoming videos And I want to tell you people that this is a PDF I will give you the link in the description also download this. Right now we have only the first chapter, the zero chapter, the introduction chapter which: it has just arrived I will also give you the PDF of the first chapter You will continue to get PDFs of all the upcoming chapters. And after seeing these codes, you guys will become the champion of JavaScript, that's my promise.
So guys that's all in this video for now Thankyou so much guys for watching this video And i will see you next time.
