Verilog fork

Verilog `fork` statement is used to execute multiple blocks of code concurrently. The `fork` statement is followed by one or more `begin` blocks separated by the `join` keyword. Each `begin` block represents a concurrent block of code that will execute simultaneously with the other blocks. The `join` keyword marks the end of the `begin` block and indicates that the concurrent execution of that block has completed.

Here is an example of a Verilog `fork` statement:

fork
  begin
    // First block of code
  end
  begin
    // Second block of code
  end
join

In this example, two blocks of code are executed concurrently within the `fork` and `join` statements. The first block of code executes simultaneously with the second block of code, and both blocks complete before the `join` statement is reached.

It is important to note that variables declared within a `fork` block are local to that block only, and cannot be accessed outside of it. Additionally, the order of execution of the concurrent blocks is not guaranteed and may vary between simulations.