import streamlit as st

# Set page configuration
st.set_page_config(page_title="Calculator App", layout="centered")

# Title of the app
st.title("🧮 Simple Calculator")

# Instructions
st.write("Perform basic arithmetic operations like addition, subtraction, multiplication, and division.")

# Input fields for numbers and operation
num1 = st.number_input("Enter the first number", value=0.0, step=1.0, format="%.2f")
num2 = st.number_input("Enter the second number", value=0.0, step=1.0, format="%.2f")
operation = st.selectbox("Choose an operation", ["Addition", "Subtraction", "Multiplication", "Division"])

# Perform the calculation
result = None
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!")

# Display the result
if result is not None:
    st.success(f"The result of {operation.lower()} is: {result:.2f}")

# Footer
st.write("---")
st.caption("Developed with ❤️ using Streamlit.")