What is the difference between always_comb, always_latch, and always_ff in SystemVerilog?

In SystemVerilog, the keywords always_comb, always_latch, and always_ff are used to define different types of procedural blocks. Here is a brief explanation of the differences:

• always_comb: This keyword is used to define a procedural block that represents combinational logic. The statements inside an always_comb block are evaluated whenever there is a change in the input variables.
• always_latch: The keyword always_latch is used to define a block that represents latch-based logic. It is used when implementing latch-based circuits, where the output is based on the level-sensitive state of inputs.
• always_ff: When using always_ff, you are specifying a block that represents flip-flop-based logic. This is commonly used for sequential logic design, where the output depends on the current state and clock signal.

It is essential to use the appropriate keyword based on the type of logic you are implementing in your SystemVerilog design, as each keyword has specific implications for simulation and synthesis.