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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
asked in Programming by c-programming Functions

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