Why we will not write return in void main ??

Answer 1

As a matter of fact we could use return with void methods, but with no returned value

See ex: in below

public class Program
{
public static void main(String[] args) {

showPositive(9);// prints 9

showPositive(-5);// prints nothing
}

public static void showPositive(int i){

if(i<0) {
return;
}

System.out.println("i=" + i);
}
}

Answer 2

Because main returns no value. Where would you want to return a value to?