Why we are not returning any value in a main function?

Question

we run the code it does not give any error.

Answer 1

Please be specific about your question like mention the language or if possible share link of your post.

Answer 2

If you are talking about Java....you can pass any number of String argument to main() method from command line

public class Main
{
public static void main(String args[])
{
System.out.println(args[0]);
System.out.println(args[1]);
System.out.println(args[2]);
}
}

javac Main.java
java Main hello world "hello world!!"