add first and second exercise of lecture 6

1 files changed, 15 insertions, 0 deletions

diff --git a/lec06/Fibonacci.hs b/lec06/Fibonacci.hs
new file mode 100644
index 0000000..79f888e
--- /dev/null
+++ b/lec06/Fibonacci.hs
@@ -0,0 +1,15 @@
+-- Exercise 1
+
+fib :: Integer -> Integer
+fib 0 = 0
+fib 1 = 1
+fib n = (fib (n-1)) + (fib (n-2))
+
+fibs1 :: [Integer]
+fibs1 = map fib [0..]
+
+-- Exercise 2
+
+fibs2 :: [Integer]
+fibs2 = 0 : (map last $ iterate (\l -> [ last l , last l + (last . init) l ]) [0,1])
+