Example
A single line comment starts with two hyphens (--) and extends up to the end of the line. Example :
-- This process models the state register
process(clock, aresetn)
begin
if aresetn = '0' then -- Active low, asynchronous reset
state <= IDLE;
elsif rising_edge(clock) then -- Synchronized on the rising edge of the clock
state <= next_state;
end if;
end process;
