Start multiple tasks in parallel and wait for them in windows?

Question

How do I execute some tasks in parallel in batch script and wait for them?

command1;

# command3, command4 and command5 should execute in sequence say task1
         


        

Answer 1

I think this is the simplest way to do that:

command1

(
   start "task1" cmd /C "command3 & command4 & command5"
   start "task2" cmd /C "command6 & command7 & command8"
) | pause

command9

Further details in the comments below this answer.