The Difference Between Immediate Assignment and Blocking Assignment in SystemVerilog

Immediate assignment in SystemVerilog uses the '=' operator to assign a value to a variable immediately, without waiting for other processes to complete. This means that the assigned value takes effect immediately, which can lead to race conditions if not used carefully.

Blocking assignment, on the other hand, uses the '=` operator. Blocking assignments are executed sequentially, meaning each assignment statement must wait for the previous one to complete before proceeding. This ensures that the assigned values are updated in order, avoiding race conditions.

Overall, immediate assignment is used for concurrent processes where timing is not critical, while blocking assignment is used for sequential processes where the order of operations is important.