app.py

import streamlit as st

st.set_page_config(page_title="Simple Calculator", page_icon="🧮")

st.title("🧮 Simple Calculator")

# User input
num1 = st.number_input("Enter first number:", value=0.0, step=1.0)
num2 = st.number_input("Enter second number:", value=0.0, step=1.0)
operation = st.selectbox("Select operation:", ["Addition", "Subtraction", "Multiplication", "Division"])

# Perform calculation
result = None
if st.button("Calculate"):
    if operation == "Addition":
        result = num1 + num2
    elif operation == "Subtraction":
        result = num1 - num2
    elif operation == "Multiplication":
        result = num1 * num2
    elif operation == "Division":
        if num2 != 0:
            result = num1 / num2
        else:
            st.error("Division by zero is not allowed.")

# Show result
if result is not None:
    st.success(f"The result of {operation.lower()} is: {result}")