Update app.py

app.py

@@ -4,10 +4,10 @@ import numpy as np
 import matplotlib.pyplot as plt
 
 # Create some example data
-df = pd.DataFrame({
-   'x': range(100),
-   'y': np.random.randn(100)
-})
+st.write("Hello, World!")
 
-# Use Streamlit to display a line chart
-st.line_chart(df)
+# display HTML
+st.write("<h1>Hello, World!</h1>", unsafe_allow_html=True)
+
+# display Markdown
+st.write("# Hello, World!")