# calculator_app.py

import streamlit as st

# Title
st.title("🧮 Basic Calculator App")

# Input Fields
num1 = st.number_input("Enter first number:", value=0.0, format="%.2f")
num2 = st.number_input("Enter second number:", value=0.0, format="%.2f")

# Operation Selection
operation = st.selectbox("Choose an operation:", ["Addition", "Subtraction", "Multiplication", "Division"])

# Calculate on button click
if st.button("Calculate"):
    try:
        if operation == "Addition":
            result = num1 + num2
            st.success(f"Result: {result:.2f}")
        elif operation == "Subtraction":
            result = num1 - num2
            st.success(f"Result: {result:.2f}")
        elif operation == "Multiplication":
            result = num1 * num2
            st.success(f"Result: {result:.2f}")
        elif operation == "Division":
            if num2 == 0:
                st.error("Error: Division by zero is not allowed.")
            else:
                result = num1 / num2
                st.success(f"Result: {result:.2f}")
    except Exception as e:
        st.error(f"An error occurred: {e}")