# app.py
import streamlit as st

st.title("🧮 Simple Calculator App")

st.write("Select an operation and enter two numbers:")

# Input fields
num1 = st.number_input("Enter the first number:")
num2 = st.number_input("Enter the second number:")

operation = st.selectbox(
    "Choose an operation:",
    ("Addition (+)", "Subtraction (-)", "Multiplication (*)", "Division (/)",
     "Exponentiation (^)", "Modulus (%)", "Floor Division (//)")
)

result = None

# Calculation logic
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("Cannot divide by zero!")
    elif operation == "Exponentiation (^)":
        result = num1 ** num2
    elif operation == "Modulus (%)":
        if num2 != 0:
            result = num1 % num2
        else:
            st.error("Cannot perform modulus by zero!")
    elif operation == "Floor Division (//)":
        if num2 != 0:
            result = num1 // num2
        else:
            st.error("Cannot perform floor division by zero!")

    if result is not None:
        st.success(f"Result: {result}")