# app.py
import streamlit as st

# Set the page title
st.set_page_config(page_title="Hello World App")

# Display a title
st.title("Hello, World!")

# Display a message
st.write("This is a Streamlit app that says 'Hello, World!'.")

# Add some interactivity (optional)
user_name = st.text_input("Enter your name:")
if user_name:
    st.write(f"Hello, {user_name}!")