diff --git a/helloworld/README.md b/helloworld/README.md
new file mode 100644
index 00000000..4d63fef3
--- /dev/null
+++ b/helloworld/README.md
@@ -0,0 +1,2 @@
+## Introduction
+This is a kcl package named helloworld.
diff --git a/helloworld/kcl.mod b/helloworld/kcl.mod
new file mode 100644
index 00000000..bef7e7f7
--- /dev/null
+++ b/helloworld/kcl.mod
@@ -0,0 +1,5 @@
+[package]
+name = "helloworld"
+edition = "0.0.1"
+version = "0.0.1"
+
diff --git a/helloworld/kcl.mod.lock b/helloworld/kcl.mod.lock
new file mode 100644
index 00000000..e69de29b
diff --git a/helloworld/main.k b/helloworld/main.k
new file mode 100644
index 00000000..fa7048e6
--- /dev/null
+++ b/helloworld/main.k
@@ -0,0 +1 @@
+The_first_kcl_program = 'Hello World!'
\ No newline at end of file