diff --git a/ex01/hello_world.sh b/ex01/hello_world.sh
new file mode 100644
index 0000000..bada43c
--- /dev/null
+++ b/ex01/hello_world.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+hello_world() {
+    name="World"
+    if [ -n "$1" ]; then
+        name="$1"
+    fi
+
+    echo "Hello, $name!"
+}
+
+hello_world $1
\ No newline at end of file