(Sigma batch 2025) syntax with parameters  by shradha didi - video Dailymotion

Prateek Prajapati

Sigma batch

Transcript

00:00Now let's discuss another syntax of the functions in which there are parameters

00:06Parameters are our function's input

00:09How did we decide the output? We decided the output from a return type

00:14In this function, there is a thing called parameters that tells us what should be input

00:20In this syntax, first we write the return type function

00:23Then we write the name function

00:25And we write all the parameters that we want to take into the function as input

00:30So here, this parenthesis and this parenthesis are our function's input

00:37Then we write our function's body

00:39In which we write all our code and logic

00:42And in the last, we have a return statement

00:44Return statement can be changed depending on how our function's return type

00:48Let's discuss a sample program

00:51What do we want to do? We want to make a function

00:54In the function, we are going to give input a and a number b

00:58And we are going to output sum of a, b

01:02How do we write this code?

01:04First we write our code in the main function

01:06What do we want to do? We will make a scanner class

01:09System.in

01:12We will import our package

01:15Java.util.all

01:19Now what do we want to do?

01:20First we will input our first number

01:23Then we will use second number

01:25Then we are going to calculate

01:27The sum of a variable

01:29Int sum is equal to a plus b

01:31And what do we do?

01:33Finally we will print this sum

01:35Sum is sum

01:37Now what is the whole work

01:39We have to shift this work

01:41We have to shift this function

01:43So let's write a function

01:45Also, how many functions in a class

01:47We can make a function of a print hello world

01:49We will make a function of a sum

01:51Now we can make a function of multiple functions

01:53In a single class

01:55First we will write public static

01:57First we will write public static

01:59Now when we start this function

02:01We will keep the return type

02:02We will keep the return type

02:03That we are not doing anything

02:04And we will give it the name

02:05Calculate sum

02:08In the sum

02:09In the sum

02:10We will not send anything to input

02:11What do we do?

02:12We will take the whole code

02:14And take it here

02:16And what will we do?

02:18Main function simply call

02:20And what will we do?

02:22Main function simply call

02:24Calculate sum

02:25Calculate sum

02:27Now let's run this code

02:29The main function has called

02:31Calculate sum

02:32We are here

02:33In this Calculate sum

02:35It has made a scanner class

02:37So first we need a first number

02:39A

02:40We will pass 5

02:41Then we need a second number

02:42B

02:43We will pass 10

02:44And then we will have

02:46Calculate sum

02:47Which is going to be 15

02:49Now we will change some changes

02:51What changes are

02:53This scanner

02:54And this input

02:55We will shift the same

02:56In the main function

02:58In the main function

02:59The main function will scan

03:00The main function will see

03:01A and B

03:02But this A and B

03:04How will reach this sum function?

03:05They will reach the parameters

03:07Where do we write the parameters?

03:09We will write the parameters

03:10In the parentheses

03:11In the parentheses

03:12First we will write our first parameter

03:14Its type

03:15Int

03:16And name A

03:17Then our second parameter

03:18Int B

03:19Int

03:20Int

03:21So

03:22So our first parameter is int a, second parameter is int b

03:27These two are in our calculate sum function

03:30If I remove them, the parameters from here

03:34What will happen? There will be an error

03:36Why will it happen? Because this function doesn't know what a and b

03:40Then I will know when I pass these two a and b

03:43I will pass these parameters to this function

03:45If I name number 1 or number 2

03:51So my sum will calculate for number 1 and number 2

03:57So I have written a definition of a function

03:59Which calculates the sum

04:01These two numbers will take number 1 and number 2

04:02They will calculate the sum and print it in the print

04:05What do I have to do in the main function?

04:08I have taken a and b

04:10Now I have to call the calculate sum

04:12But with the calculate sum, I have to pass my two integer values

04:17Because the calculate sum requires two numbers

04:20So what will I do? I will pass a first and then b

04:23Let's save and run again

04:25So first number is 5, second number is 10 and sum is 15

04:31So what did I do? I have passed my numbers in this function

04:36How did I pass it?

04:37I have to pass it in parenthesis

04:39First number is 1st number and then second number

04:41And in my function

04:43I received those numbers as parameters

04:45And then I have removed the sum and print it in the sum

04:49Now this is the work of the sum to print it

04:51I can do this in the main function

04:53How can I do this?

04:55So what do I do here?

04:57I will write int sum is equal to calculate sum

05:02And this function I will return type and write int

05:05And here I will return sum

05:09So what did I do?

05:10I have made a function that calculates sum

05:13And now I have made a function of number 1 and number 2

05:15Which also comes in the input

05:16And the sum is calculated and returned

05:19So I have returned sum

05:21Who did I return?

05:22Who did I call it?

05:23Who did I call it?

05:24The main function has called it

05:25That's why the calculate sum

05:27The return type of sum is int

05:29Because it is a integer value sum

05:31How did it return?

05:33How did it return?

05:34It returned from this statement

05:36And from this assignment operator

05:38Now I can store it somewhere

05:40So I have sum name the other variable

05:43This sum variable

05:45And this sum variable

05:46Both are different

05:47Because these are different functions

05:49We will study scopes

05:51In this chapter

05:53We will understand the details

05:55How these variables are different

05:57They are different

05:58Same variable

05:59So I have stored this variable

06:01And then I have done that sum

06:03Let's save it

06:05And run

06:07So first number 5

06:08Second number 10

06:10So I have printed sum is 15

06:12And how did I do this?

06:13I have simply done these 3 lines

06:15Where there is a function

06:16Which takes some input

06:18Some work

06:19And then

06:20It returns some output

06:22And then

06:23And then

06:24Also

06:26So

(Sigma batch 2025) syntax with parameters by shradha didi

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