What is the purpose of main() function? | C Programming

In C, program execution starts from the main() function. Every C program must contain a main() function. The main function may contain any number of statements. These statements are executed sequentially in the order which they are written.
The main function can in-turn call other functions. When main calls a function, it passes the execution control to that function. The function returns control to main when a return statement is executed or when end of function is reached.
In C, the function prototype of the 'main' is one of the following:
int main(); //main with no arguments
int main(int argc, char *argv[]); //main with arguments
The parameters argc and argv respectively give the number and value of the program's command-line arguments.
Example:
#include<stdio.h>
/* program section begins here */
int main() 
{
// opening brace - program execution starts here
printf("Welcome to the world of C");
return 0;
}
// closing brace - program terminates here
Output:
Welcome to the world of C