Default Value. The value specified in the in-out parameter configuration.
Value. The current value of the parameter as the task progresses. When a task starts, the value is the same as the default value. As the task progresses, the task calculates the value using a function that you set for the parameter. The task evaluates the value as each row passes through the mapping. Unlike the default value, the value can change. The task saves the final value in the job details after the task runs.