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Now, let's talk about the main function.

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So we have a function in C++ guide main function where the program execution starts.

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So always C++ program execution starts from main function, which means that walked all things we want

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to make our computer do.

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We should be defining that in, say, this main function.

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So I'm writing the main function and the syntax for writing.

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The main function is Int Main Bracket Open Close then opened up emphasis on the curly brackets.

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No logical things to write inside these curly basis that all things will be executed by the CBB component.

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So you will be wearing what is compiler so that in a small definition I can give you compiler is the

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way that I block programming code is converted into computers.

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Native language.

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So computer is not a human being, it's it electronic device altered things.

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The computer what to understand should be in a format which it is meant to understand.

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Like if I only know English language and if somebody is talking to me in Spanish, I won't be understanding

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anything.

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Similarly, computer only knows one language for machine language.

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It won't understand anything apart from that.

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So in order to make computer understand, we will be using machine language because it's the native

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language of the computer.

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So this language is called High-Level Language.

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All the programming languages like C, C++, Java, everything is called High-Level Language.

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These are the language which we understand so that we can write programs or instructions, which can

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be said like used for creating tasks for which which are meant to be executed by the computer.

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But in the case of like high level languages, when we give the high level language to statically to

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computer, it won't understand it.

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So in order to make the high level language languages more understandable for a computer, we will do

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a process called competition, and computation is done by a software like compiler.

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So these, like we may be using it, kind of commands to create that compilation process.

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So that's about competition.

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What are all things we write in the C++ language?

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We need to convert it in a language that computers understand.

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So that process is done by a software called compiler.

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And that process is card combination.

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So I will be using this term again and again, and we will be seeing competition throughout the program.

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So once the compilation is starting and we start to run the program, all the things written inside

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these curly braces or the main function will be executed by the computer.

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So let's write out a statement.

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See.

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Hello.

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What?

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And we put a semicolon at the end of that statement.

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This is because all the C++ programming statements, except some statements will be ending with semicolons.

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So these are the statements in C++, and these statements will always end with a semicolon.

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So code is that command order function, which will be helping the users to print the values which is

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given in their code statement.

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So the syntax for using CODIS you have to use this year keyword, then you have to use this two symbols,

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which is the greater than grade and then symbols two are pointing towards the Hello world.

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So which means we will be printing this statement.

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So this is going to this streaming session operator, which will put the data to that standard output

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device, which is the monitor, so that all things you like would see our cover and then putting the

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stream insertion keyword or symbol that will be put to that monitor or standard output device in that

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system.

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So this is that in output statement for printing, hello.

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Then we will be writing return.

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Zero.

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So why are you liberating the 10 zero, it's like we have used main function with indigenous prototyping.

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So that's why we are using returns zero.

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So you will be wondering why this prototyping, why it is written statement everything so that we will

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cover in the module card functions.

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For now, we'll be writing our first and basic C++ programming program, and you need not to worry about

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all these statements meaning it or.

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So just see, this is the basic structure of C++ program.

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So now we can start running and executing the program.

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So first of all, like I have said, this program is in a language which we understand because it's

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in the language that seems like computers should Anderson, but it's only a language, which is meant

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more easier for us to understand.

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So what we need to do is like, we need to convert this language, this program in their statements,

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which computer can understand or that machine language.

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So we need to compile this program.

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So what we do to compile this program is, first of all, I think you are familiar with some of the

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next comments.

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My location of this particular program is desktop.

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So inside my terminal, I will be navigating through desktop then.

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Now I need to compile this file so that it will be.

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These instructions can be converted into machine instructions.

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So I will be comparing this program by writing a code like Commands by G Plus Plus, which is a combination

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command which we will use inside Linux or Mac OS.

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So Windows, it's kind of different so you can refer to the manual for Windows for compiling the program.

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It's available with that here.

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C C++ compiler tutorials are available on the Visual Studio board, so D-plus presses the command.

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Then I have to write the file name.

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Hello, Lloyd Doggett CB.

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So what happens when I press enter in this particular command is the D-plus Plus.

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Is that on Belarus to the system, it will compile my file Hello World C++ into a meaningful program.

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So let's hit.

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And so you don't see any kind of commands or get any kind of warning sign at us or here you can just

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see a blank next line coming in.

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That means your program is compiled successfully.

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You don't have any of it.

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So let's see what happens if my program have some kind of state also began seeing this do about it.

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So I'm replacing this semicolon and saving the program, and I'm again writing that computation statement

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over here, gebreselassie global Nazi people and pressing the end.

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So now you can see the exact error.

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I say there should be a semicolon after the end of the program, and here I didn't put the semicolon.

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So what happened the program through and error and the combination was failed.

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So in order to make this successful and flipping the semicolon again, saving the program again and

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running the completion call or the statement now it's compiled successfully.

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So after the competition, we will get an executable file in our system, so you can see over here there

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is a file created called in or out.

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We just not there previously.

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So this is that compiled at the site of that program.

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So this is the executable.

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No, you need to execute that program.

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So our program was created in CBP.

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We have compiled it and we have created an executable file, which computer can understand.

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So if I try to open this executable file in some kind of extended test, you will be getting the idea

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like what it will be looking like.

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So I will just open it in some sort of program.

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Let's go with the text editor and an opening that see here.

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We have a lot of things, but we don't understand anything.

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This means this is the actual compiled version of our program.

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It's not in that sense which we understand because it's something else.

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It's something understandable only to the computer.

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So we need not to worry about this.

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What we can do is like we can execute this file.

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So to execute this 8ot out, which is a result of my comp. Hello world, not CBB, I have a comment.

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Let's go to that comment.

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Dot slash here, dog.

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So my file name of the campaign file name is, you know, now and I am writing Dot Slash to execute

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backward and embarrassing.

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And so now you can see how older dog here, which is that the side of my program so you can see how

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many statements we have here in our particular programming language, C++ in order to just print Hello

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World and the council.

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So think about the large programs in the hour, the software's in the market or a play store, or even

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the system or the computer, which we use.

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How many lines it should probably have to create to such a complex program?

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Right.

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So that is one thing which you have to think, and this is how we execute C++ program.

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So pretty much in this module, we have covered our topics.

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We discussed the basic understanding of programming, what is programming?

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And we also discussed the peculiarities of programming languages, C++ and also we have seen how to

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write their basic C++ program, how to run or how to compile it.

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So I hope this year that you have understood pretty much everything, and I suppose you should have

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some confusions here and there because it should be there because this is just an introductory section

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and moving further, we will be learning much more about this programming language and we will be understanding

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why we will be using all these things and we will be understanding more concepts, which we discussed

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in just a small portion or like in a summary here in this unit, more in depth in comment on it.

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So you will be able to understand more things.