The Branching Factor
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
The branching factor of a tree is the number of choices available at each step — written b.
Show
A fixed-price dinner: 3 starters, then 4 mains, then 2 desserts — branching 3, then 4, then 2.
Watch for
Real trees branch unevenly; one number, typical or exact, is what the arithmetic needs.