Differences between "initial" and "always" blocks in SystemVerilog

When it comes to SystemVerilog, there are key differences between initial and always blocks that you should be aware of.

1. Initial Block

The initial block is used for executing code only once at the beginning of the simulation. It is typically used for initializing variables or setting up initial conditions for the simulation.

2. Always Block

On the other hand, the always block continuously executes the code inside it whenever its sensitivity list conditions are met. This means that the always block is used for describing sequential and combinational logic, and the code inside it will be executed repeatedly throughout the simulation.

Key Differences:

• Initial block executes code only once at the beginning, while the always block executes continuously.
• Initial block is primarily used for initialization tasks, while the always block is used for describing hardware logic.
• Initial block does not depend on any sensitivity list, while the always block does.

Understanding the differences between initial and always blocks is crucial for designing effective SystemVerilog code and ensuring the desired behavior of your design.