app.py

import streamlit as st

# Title and Description
st.title("🌡️ Temperature Converter")
st.write("""
This app converts temperatures between Celsius, Fahrenheit, and Kelvin.  
Enter a value and select the conversion type to get started.
""")

# Input Section
temperature = st.number_input("Enter the temperature value:", value=0.0)
conversion_type = st.selectbox(
    "Choose the conversion type:",
    ["Celsius to Fahrenheit", "Celsius to Kelvin", 
     "Fahrenheit to Celsius", "Fahrenheit to Kelvin", 
     "Kelvin to Celsius", "Kelvin to Fahrenheit"]
)

# Conversion Logic
def convert_temperature(value, conversion):
    if conversion == "Celsius to Fahrenheit":
        return (value * 9/5) + 32
    elif conversion == "Celsius to Kelvin":
        return value + 273.15
    elif conversion == "Fahrenheit to Celsius":
        return (value - 32) * 5/9
    elif conversion == "Fahrenheit to Kelvin":
        return ((value - 32) * 5/9) + 273.15
    elif conversion == "Kelvin to Celsius":
        return value - 273.15
    elif conversion == "Kelvin to Fahrenheit":
        return ((value - 273.15) * 9/5) + 32
    else:
        return None

# Perform Conversion
result = convert_temperature(temperature, conversion_type)

# Display Result
if result is not None:
    st.subheader(f"Converted Temperature: {result:.2f}")
else:
    st.error("Invalid conversion type selected.")

# Footer
st.write("---")
st.markdown("Created with ❤️ using [Streamlit](https://streamlit.io/).")