Update app.py

app.py

@@ -1,4 +1,6 @@
 import streamlit as st
 
 x = st.slider('Select a value')
-st.write(x, 'squared is', x * x)
+st.write(x, 'squared is', x * x)
+uploaded_file = st.file_uploader("Choose a file to upload")
+st.write(uploaded_file)