diff --git a/01_Day_Introduction/helloworld.js b/01_Day_Introduction/helloworld.js
new file mode 100644
index 0000000..efc5647
--- /dev/null
+++ b/01_Day_Introduction/helloworld.js
@@ -0,0 +1,16 @@
+function processData(inputString) {
+    console.log("Hello, World.");
+    console.log(inputString);
+}
+
+
+process.stdin.resume();
+process.stdin.setEncoding("ascii");
+_input = "";
+process.stdin.on("data", function (input) {
+    _input += input;
+});
+
+process.stdin.on("end", function () {
+   processData(_input);
+});