Lua solutions for week 137

1 files changed, 34 insertions, 0 deletions

diff --git a/challenge-137/abigail/lua/ch-2.lua b/challenge-137/abigail/lua/ch-2.lua
new file mode 100644
index 0000000000..1cfb4f84e9
--- /dev/null
+++ b/challenge-137/abigail/lua/ch-2.lua
@@ -0,0 +1,34 @@
+#!/opt/local/bin/lua
+
+--
+-- See ../README.md
+--
+
+--
+-- Run as: lua ch-2.lua < input-file
+--
+
+function reverse (num)
+    local rev = 0
+    while num > 0 do
+        rev = rev * 10
+        rev = rev + (num % 10)
+        num = math . floor (num / 10)
+    end
+    return (rev)
+end
+
+
+function ly (n)
+    if     n >= 10000000
+    then   return (1)
+    elseif n == reverse (n)
+    then   return (0)
+    else   return (ly (n + reverse (n)))
+    end
+end
+
+
+for number in io . lines () do
+    print (ly (tonumber (number)))
+end