Chapter 1: The Value Class - Recording the Forward Pass

What You'll Build A class called Value that wraps a double and remembers how it was created. Think of it as a number that keeps a receipt of every operation it went through. Why This Comes First In the Big Picture, Step 1 (the forward pass) chains together thousands of small operations, and Step 3 (the backward pass) walks those operations in reverse. For that to work, every operation has to leave a record behind: what were the inputs, and how sensitive was the output to each input? The Value cl