How for loop inside the fork will execute?

SystemVerilog
,
2

In reply to Manoj J:

you are right they got executed in parallel.
But what is important to understand that both variables a & b changed their values from 0-9 in zero time.
So its just that simulator has to choose whose $display to flush first.

If you want to see the parallel execution.
You must see the change w.r.t. time.
Just small modification in your code :

module top;
  int a,b;
  initial fork
    for(int i=0;i<10;i++) 
      #10 $display("a=%d",i);
    for(int j=0;j<10;j++)
      #10 $display("b=%d",j);
  join
endmodule

will get the output as desired !