## Fibonacci
1,1,2,3,5,8,...
1. What are next three?
2. How to number them?
---
## Fibonacci
|n|0|1|2|3|4|5|6|
|-|-|-|-|-|-|-|-|
|fib(n)|1|1|2|3|5|8|13|
f(8) = ?
---
## Fibonacci
Where does it start?
`fib(0) = 1`
`fib(1) = 1`
Pattern?
`fib(102) = ?`
---
## Fibonacci
Write the function `(fib n)`.
Use a conditional.
---
## Fibonacci
```racket
(define (fib n)
(cond [(= n 0) 1]
[(= n 1) 1]
[else ... ]))
```
---