A component of a system whose behavior is to be described and simulated. A driver list that specifies a waveform. The first conditional found to be true determines the value transferred to the output. The Selected Signal Assignment Statement behaves similarly. To model systems at high levels of abstraction.
Process incorporate conventional programming language constructs.
A process is a sequentially executed block of code, which contains. Signal assignments to external signals. Processes contain sensitivity lists in which signals are listed, which determine when the process executes. In reality, CSAs are also processes without the process , begin and end keywords. Looping Looping constructs include the for and while statements, e.g., The loop index is implicitly declared, local to the loop and cannot be changed.