src/streamlit_app.py

import streamlit as st

st.title("Simple Calculator")

# Input numbers as text
num1 = st.text_input("Enter first number:", "0")
num2 = st.text_input("Enter second number:", "0")

# Convert input to integers
try:
    num1 = int(num1)
    num2 = int(num2)
except ValueError:
    st.error("Please enter valid integers.")

# Operation selection
operation = st.radio("Select operation:", ("Add", "Subtract", "Multiply", "Divide"))

# Calculate result
if st.button("Calculate"):
    if operation == "Add":
        result = num1 + num2
    elif operation == "Subtract":
        result = num1 - num2
    elif operation == "Multiply":
        result = num1 * num2
    elif operation == "Divide":
        result = num1 / num2 if num2 != 0 else "Error: Division by zero!"
    st.success(f"Result: {result}")