Difference between Function and Task in Verilog

Function	Task
A Function must execute in one simulation time unit.	A Task may execute in non-zero simulation time.
A function can’t contain time-controlling event.	A task can contain time-controlling event.
A function can enable only function, not task.	A task can enable function and task.
A function must have at least one input argument.	A task can have zero or more arguments of any type.
A function returns a single value that is of bit or vector.	A task doesn’t return a value.