How and why can a Semaphore give out more permits than it was initialized with?

Question

I am reading the book Java Concurrency in Practice. In a section about java.util.concurrent.Semaphore, the below lines are present in the book. It is a comment abou

Answer 1

As mentioned in first post "Semaphore is not limited to the number of permits it was created with"

Every call to .release() API will increase the permit count by one. So Semaphores doesn't have a fixed permit size