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So next part, this function declaration here is where we declare the function, we will introduce the

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compiler, our function with its definition.

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So suppose I am planning to add numbers three and five and I should have an option to create the function

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cards, some which accept this variables, let's say and b, and it should be only accepting integer

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numbers, not floating by numbers.

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So how should I define the function?

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So you, as you know, my function, is aimed at adding two numbers.

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So my function will always act on numbers and get another number.

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I set the static audits and indigena, but I say it isn't.

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If I am doing this, I will get that indigenous instead.

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So here it shows this is the return date, which means when this function is getting executed, that

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when the function name some is getting executed, that it will return a value with the return date int.

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Now this function named some will accept new variables for operations.

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It's a and b, so suppose if I am leaving like this some.

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Three comma, five.

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Exactly this function will exit three here on air and five here on B.

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Then what will happen, the rest of the card is included in this.

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So we will be putting a brace and giving the function definition.

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So here we are planning to see out of print.

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We are inside the some function and some may be that variable also have been declared yet.

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So here is three when I use this s Garling statement, this will be here and this will be B.

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So five plus three is eight.

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So here we have a written statement, which is eight, which will give that man.

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We have guard this support.

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I have got some e going to let it be in.

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Some may go to some or some function.

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This is some function, some of it comma certified comma three.

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Then it will be like going like this, so it will be calling this definition.

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It will be giving.

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Now I have changed about using that change the values.

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So anyway, some snake bodies equals anyway.

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This will be five and this will be three.

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Then it will be it is playing inside some function, then will be doing five plus three.

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It will be eight and then it will return some, he added.

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This is the return date.

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So what happens?

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It will return the value of something that is eight that will come out here.

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So the result will be some will be eight.

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And one more thing you have to note, I have declared to some media, which already had one is inside

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the function and one is outside the function.

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So both will be different because this variable was just declared inside.

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The function will be a local variable and the other one will be that variable out of scope.

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That means it may be able to be just defined inside the function well in its scope.

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Scope means its value will not be accessible.

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After we leave that particular function so it can be defined, all here will not be accessible beyond

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this function.

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It will be still that.

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So that's why we are returning this summer because some is deleted or some is removed from the memory

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just after this function has exited.

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So in order to proclaim that some variable or some value, we need to return that.

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And that's why we are using added turned back over here.

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Hope you have, I'm not sure.

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So there will be three important box which will be inside a function.

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Why this function declaration, which will show that return type of the function name of the function?

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The argument is accepted by the function any number of arguments function can, except suppose we can

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also create a function that accepts 10 number SoyNut.

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Some.

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India coal mine to be karma in the sea, etc. Likewise, we have we can divine any number of arguments

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and the function will be able to process that and modernise like air function can always avoid returning

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memories.

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This written statement is optional.

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Suppose if I don't want to return to some, I just want to print it right away here I can just put out

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a statement.

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But in the summer here and I can remove the statement, and if there is no written statement or return

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time, then they function.

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The return date should be void.

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That's it.

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That's the only thing I would do.

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Make sure.

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So anyway, I have explained to you everything on here, it says, anyway, began gems Typekit right

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away and do it smaller demand functions.

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So let's jump in visual studio code.

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So here I have a.

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Program created for you and scored fine, send out CBP here.

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We have declared a complete we have written a complete program which is used to add two numbers, but

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using function.

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So here you can see a preprocessor Dorothy Namespaces declared out here, then we can see the next statement

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is functioning prototype, and it will be just giving an introduction to compiler that there will be

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a functional definition ahead.

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And the final senator turntable will be in the final version, namely, the addition and the final change

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variable is which accept will be A and B.

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So this is just an order we know yet again.

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See, we have to mostly like re-edit and addition variable created to store the value add and then a

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reading two numbers.

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Number one and number two.

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Then I'm calling the function to add this number one and number two.

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So what happened at equal edition number one and number two?

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Then straightaway, the control will be going to here.

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That means the function definition here, what you can see in the addition it will accept and the NBA

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in the sense, the number one which we have provided will be here.

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00:06:54,900 --> 00:07:03,060
And number two will be b OK and it will return a plus b, whatever number I have given us, number one

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and number two will be stored on standby B.

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00:07:05,520 --> 00:07:10,320
And if then add these two numbers and B and return that value to that column.

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This is that calling function for a function call place, he added.

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In return, the value of fatty and it will store the value to this medium now just on the next statement

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and pending the addition value.

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See, this function is created just after the main function is closed, so you can either create a function

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00:07:33,510 --> 00:07:38,570
inside the main function itself or you can create it outside, but that's fine.

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So if we are, that's why we are providing you function prototype power here, which means the program

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00:07:45,710 --> 00:07:47,660
doesn't end after the main function.

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There are some functions also defined outside the main function.

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So now let's see this program in action so that you will understand this problem.

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So let me switch to my desktop directly.

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00:08:03,500 --> 00:08:11,960
Now I'm going to do C++ compiler this program function doc CPB.

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00:08:13,070 --> 00:08:17,930
Successfully done by now, I am going to get the output.

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00:08:19,340 --> 00:08:21,680
So it's asking me for the first number I'm giving.

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Well, it's asking me for the second number I'm giving.

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I gain.

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18.

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So it will be 30, right?

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00:08:31,630 --> 00:08:33,750
Let's end up right.

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00:08:34,090 --> 00:08:40,750
Irishness 30, what happened and first number, he here to execute that no one is 30.

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00:08:40,960 --> 00:08:41,640
Sorry, Brad.

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And number two, he's 18.

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So I'm passing this tour.

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I am going to show leg and add these numbers and return them to here.

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And I'm bringing this back.

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That is 30.

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That's it.

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Hope you have understood this concept.

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Now we can jump back to our presentation.

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Bed, we have something more to let.