app.py

import streamlit as st

# Streamlit application
st.title("Sum Calculator")

# Input for user to enter numbers in the specified format
user_input = st.text_input("Enter numbers to add (e.g., 3+9+12+...):")

# Check if input is provided
if user_input:
    try:
        # Parse the input and calculate the sum
        numbers = [int(num.strip()) for num in user_input.split("+")]
        total_sum = sum(numbers)
        st.write(f"The sum of the numbers is: {total_sum}")
    except ValueError:
        st.write("Please enter a valid sequence of numbers separated by '+' signs.")
else:
    st.write("Please enter numbers in the format 3+9+12+...")