UrbanPro

Find the best tutors and institutes for C++ Language

Find Best C++ Language Classes

Please select a Category.

Please select a Locality.

No matching category found.

No matching Locality found.

Outside India?

Search for topics

What is the main difference between returning value of a function and does not return any value of a function in  C. Which is correct void main(void), int main(void), int main(int) , or void main(int) and explain the main difference between int main() and int main(void). 

Asked by Last Modified  

IT Courses/Programming Languages/C++ Language

Follow 15
Answer

12 Answers

Please enter your answer

Tutor

A function may or may not return a value to the calling function. If the function is returning a value, then you have to mention the data type in the function definition and funtion declaration (like int, float or double etc.). If the funtion not returning any value, then you have to mention the data... read more

A function may or may not return a value to the calling function. If the function is returning a value, then you have to mention the data type in the function definition and funtion declaration (like int, float or double etc.). If the funtion not returning any value, then you have to mention the data type as void. If you not mention return type, then compiler take it as int data type.

 Similary, a function  may have arguments or not. If your functions have arguments, then you have to mention data types of arguments. If you are not passing any arguemtns then you may write void or simply live it blank that is depend upon the compiler. main() is a user defined function, so it follows the same rules.

read less
1 Comments

Tutor

Hi, Thanks for A2A, your 1st question is "What is the main difference between the returning value of a function and does not return any value of a function in C". the main difference between both types of the function will be its return type as the function which will not return any value will have... read more

Hi, Thanks for A2A, your 1st question is "What is the main difference between the returning value of a function and does not return any value of a function in  C". 

the main difference between both types of the function will be its return type as the function which will not return any value will have return type "void" which means nothing wherein function with the return value should have a return type "data type" int, char, struct so ....on..while declaring/defining both !! and one more major difference will be, function with no return type (or can say void return type ) don't need any additional variable to save its return value wherein function with return value may have addition variable or additional check for return value !! 

 now coming to your 2nd question "Which is the correct void main(void), int main(void), int main(int), or void main(int) and explain the main difference between int main() and int main(void)" 

ans: best practice is to use int main(void) if it does not have command line arguments !! now using void main(void) is fine but gives warning in some compilers as the main function expected to return integer value !! now int main(int) is incorrect !!

read less
1 Comments

Training Centre

Void main(int) is the correct answer.
2 Comments

Trainer

Hi, First we understand what a function is? A function is a peice of code that can be used for code reusability. For example we are creating a calculator. Either we can write everything inside main() or for better reusability we write add, subtract etc different functions. We can call these function... read more

Hi, First we understand what a function is? A function is a peice of code that can be used for code reusability. For example we are creating a calculator. Either we can write everything inside main() or for better reusability we write add, subtract etc different functions. We can call these function whenever the needed without repeating the code. Now coming to your question function may or may not return value that depends on requirement. For example we can print add function output inside the function scope. But sometime we need that output for further calculation than we can return output of add function.

read less
Comments

JS Academy in Association With Cryptic Technologies Pvt. Ltd.

1. Both type of function can exactly the same, only difference is that return type function return some value so it can be used in expression. Non return type function doesn't return any value so it can't be used in expression. 2. The main is also a function so it can be either return type or non return... read more

1. Both type of function can exactly the same, only difference is that return type function return some value so it can be used in expression. Non return type function doesn't return any value so it can't be used in expression.

2. The main is also a function so it can be either return type or non return type.

 

Return type main function looks like this...

int main(void) {

 return 0;

}

 

Non return type main function looks like this...

void main(void) {

 

}

 

 

int main(int) {

 // This is incorrect...

}

 

read less
Comments

Whenever you put return type as int, your program always return success code to operating system which is integer value. If you use void as return type of main then your program does not return any indication to operating system. Returning int is good programming practice always. Hope this help.... read more

Whenever you put return type as int, your program always return success code to operating system which is integer value.  If you use void as return type of main then your program does not return any indication to operating system.  Returning int is good programming practice always. 

 

Hope this help. 

 

Regard, 

Sam J

www.myVuniversity.com

read less
Comments

Int main(void)--- it can be called only with a function call having no parameters. But int main() can be called by a function with any no.of parameters. int main(void) returns 0 if the program is successfully executed. void main(void) does not return anything. it is a good practice to return some... read more

Int main(void)--- it can be called only with a function call having no parameters.

But int main() can be called by a function with any no.of parameters.

int main(void)  returns 0 if the program is successfully executed. 

void main(void) does not return anything.

it is a good practice to return some value in any program to know the succesful execution.

 

read less
Comments

I have 17+ years teaching experience. I am good at subject I teach.

int main() by default returns int value. int main(void) will not return anything
Comments

Computer Wizard

int main(void) is the good practice, returning int indicates operating system that programs succesfully finished. If we use main(void) it means main fuction can be called without arguments and main() can be called with arguments.
Comments

IT Professional Development with 5+ years and 3+years IT trainer experience

Hi,If you use int main() it return something..so we mentioned return 0; if you use void main() --void does not return any values.
Comments

View 10 more Answers

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

My first C++ program
# include using namespace std; int main() { cout<<"Welcome to C++"; return 0; } Use IDE such as CodeBlocks to run this program. To do this, open CodeBlocks, Goto File->New->Empty File. Copy...

Juhi G. | 09 Jul

1 0
0

Turbo C++ Keyboard Shortcuts
S.No. Shortcuts keys Action 1. F1 For Help 2. F2 Save 3. F3 Open 4. F4 Go to cursor 5. F5 Zoom 6. F6 Next 7. F7 Trace...

Ankit kumar | 02/06/2020

0 0
0

Magic in C=> OFFSET OF MACRO in C [offsetof(TYPE, MEMBER)]
Here I am going to discuss an exciting macro in C. It will give you offset of a member within a structure. NULL or 0 address is typecasted to TYPE first. It won't result in segmentation fault as we are...

Jyotishkar D. | 20/05/2019

1 0
0

Recommended Articles

Introduction C++ is an excellent programming language and many of the applications are written in C++ language. It has generic, object-oriented & imperative programming features, and also provides facilities for low-level memory manipulation. Successor of C language, it is an OOP (object oriented programming) language...

Read full article >

Business Process outsourcing (BPO) services can be considered as a kind of outsourcing which involves subletting of specific functions associated with any business to a third party service provider. BPO is usually administered as a cost-saving procedure for functions which an organization needs but does not rely upon to...

Read full article >

Almost all of us, inside the pocket, bag or on the table have a mobile phone, out of which 90% of us have a smartphone. The technology is advancing rapidly. When it comes to mobile phones, people today want much more than just making phone calls and playing games on the go. People now want instant access to all their business...

Read full article >

Information technology consultancy or Information technology consulting is a specialized field in which one can set their focus on providing advisory services to business firms on finding ways to use innovations in information technology to further their business and meet the objectives of the business. Not only does...

Read full article >

Looking for C++ Language Classes?

Find best C++ Language Classes in your locality on UrbanPro.

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you
X

Looking for C++ Language Classes?

Find best tutors for C++ Language Classes by posting a requirement.

  • Post a learning requirement
  • Get customized responses
  • Compare and select the best

Looking for C++ Language Classes?

Find best C++ Language Classes in your locality on UrbanPro

Post your learning requirement

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more