first

app.py

@@ -1,4 +1,10 @@
 import streamlit as st
 
-x = st.slider('Select a value')
-st.write(x, 'squared is', x * x)
+
+def hello():
+    x = st.slider('Select a value')
+    st.write(x, 'squared is', x * x)
+
+
+if __name__ == '__main__':
+    hello()