diff --git a/hello_world.hs b/hello_world.hs
new file mode 100644
index 0000000..53cb2a7
--- /dev/null
+++ b/hello_world.hs
@@ -0,0 +1,4 @@
+-- haskell "hello world" program
+-- compile with 'ghc -o hello hello_world.hs' and run with './hello
+
+main = putStrLn "hello world"