diff --git a/fib.py b/fib.py
new file mode 100644
index 0000000..5f78b0e
--- /dev/null
+++ b/fib.py
@@ -0,0 +1,15 @@
+# This is n-th fibonnaci number, and only works if n >= 0
+def fib(n):
+  prev, curr = 1, 0
+  for i in range(n):
+    prev, curr = curr, prev+curr
+  return curr
+  
+# This is nearest fibonnaci number to n
+def nearestFib(n):
+  prev, curr = 1, 0
+  while curr <= n:
+    prev, curr = curr, prev+curr
+  if abs(prev+curr) < abs(curr):
+    return prev+curr
+  return curr