1 files changed, 2 insertions, 1 deletions
diff --git a/fib.awk b/fib.awk
index d599caa..654921c 100644
--- a/fib.awk
+++ b/fib.awk
@@ -4,7 +4,8 @@
 # fib sol'n from Hamming
 
 BEGIN {
-    n = ARGV[1]
+    ARGV[1] ? n = ARGV[1] : n = 0
+    ARGV[2] ? OFMT = "%." ARGV[2] "g" : OFMT = "%g"
     print (1/sqrt(5))*(0.5*(1 + sqrt(5)))^n - (1/sqrt(5))*(0.5*(1 - sqrt(5)))^n
 }