Update app.py

app.py

@@ -0,0 +1,23 @@
+import streamlit as st
+
+def calculate_note_average(notes):
+    if not notes:
+        return None
+    try:
+        numbers = [float(note.strip()) for note in notes.split(",")]
+        return sum(numbers) / len(numbers)
+    except ValueError:
+        return None
+
+st.title("Note Calculator App")
+st.write("This app calculates the average of notes you input.")
+
+notes_input = st.text_input("Enter your notes (comma-separated):", placeholder="e.g., 85, 90, 78")
+
+if st.button("Calculate Average"):
+    average = calculate_note_average(notes_input)
+    if average is None:
+        st.error("Please enter valid numeric values separated by commas.")
+    else:
+        st.success(f"The average of your notes is: **{average:.2f}**")
+