1 files changed, 39 insertions, 0 deletions
diff --git a/challenge-320/roger-bell-west/lua/ch-2.lua b/challenge-320/roger-bell-west/lua/ch-2.lua
new file mode 100755
index 0000000000..10b1d67c77
--- /dev/null
+++ b/challenge-320/roger-bell-west/lua/ch-2.lua
@@ -0,0 +1,39 @@
+#! /usr/bin/lua
+
+function sumdifference(a)
+   local delta = 0
+   for _, x in ipairs(a) do
+      if x >= 10 then
+         local digitsum = 0
+         local xa = x
+         while xa > 0 do
+            digitsum = digitsum + xa % 10
+            xa = xa // 10
+         end
+         delta = delta + x - digitsum
+      end
+   end
+   return delta
+end
+
+if sumdifference({1, 23, 4, 5}) == 18 then
+  io.write("Pass")
+else
+  io.write("FAIL")
+end
+io.write(" ")
+
+if sumdifference({1, 2, 3, 4, 5}) == 0 then
+  io.write("Pass")
+else
+  io.write("FAIL")
+end
+io.write(" ")
+
+if sumdifference({1, 2, 34}) == 27 then
+  io.write("Pass")
+else
+  io.write("FAIL")
+end
+print("")
+