main() function in C

What is main Function in C ?

The main function is an integral part of the programming languages such as C, C++, and Java. The main function in C is the entry point of a program where the execution of a program starts. 

It is a user-defined function that is mandatory for the execution of a program because when a C program is executed, the operating system starts executing the statements in the main() function.

Syntax of C main() Function

return_type  main() 

{ 

 // Statement 1 ; 

 // Statement 2 ; 

 // and so on.. 

 return ; 

}

Types of C main Functions

Main function with no arguments and void return type

void main()
{
   // Function body
}

Main function with no arguments and int return type

int main()
{
   // Function body
}

Main function with the Command Line Arguments

int main(int argc, char* argv[])
{
   // Function body
}