app.py

import streamlit as st

st.title("Simple Calculator")

# Input fields
num1 = st.number_input("Enter first number", format="%.2f")
operation = st.selectbox("Select operation", ["+", "-", "*", "/"])
num2 = st.number_input("Enter second number", format="%.2f")

# Perform calculation
result = None
error = None

if st.button("Calculate"):
    try:
        if operation == "+":
            result = num1 + num2
        elif operation == "-":
            result = num1 - num2
        elif operation == "*":
            result = num1 * num2
        elif operation == "/":
            if num2 != 0:
                result = num1 / num2
            else:
                error = "Cannot divide by zero"
    except Exception as e:
        error = str(e)

    if error:
        st.error(error)
    else:
        st.success(f"Result: {result:.2f}")