Tasks

With SystemVerilog, there is a default direction of input if no direction has been specified. Once a direction is given, subsequent formals default to the same direction. In the following example, the formal arguments a and b default to inputs, and u and v are both outputs.

task mytask3(a, b, output logic [15:0] u, v);
...
endtask

With SystemVerilog, multiple statements can be written between the task declaration and endtask, which means that the begin .... end can be omitted. If begin .... end is omitted, statements are executed sequentially, the same as if they were enclosed in a begin .... end group. It shall also be legal to have no statements at all.