app.py

import streamlit as st
def convert_temperature(value, from_unit, to_unit):
    if from_unit == to_unit:
        return value
    if from_unit == "Celsius" and to_unit == "Fahrenheit":
        return value * 9 / 5 + 32
    elif from_unit == "Celsius" and to_unit == "Kelvin":
        return value + 273.15
    elif from_unit == "Fahrenheit" and to_unit == "Celsius":
        return (value - 32) * 5 / 9
    elif from_unit == "Fahrenheit" and to_unit == "Kelvin":
        return (value - 32) * 5 / 9 + 273.15
    elif from_unit == "Kelvin" and to_unit == "Celsius":
        return value - 273.15
    elif from_unit == "Kelvin" and to_unit == "Fahrenheit":
        return (value - 273.15) * 9 / 5 + 32

def main():
    st.title("Temperature Conversion App")
    st.write("Easily convert temperatures between Celsius, Fahrenheit, and Kelvin.")

    # Input Section
    value = st.number_input("Enter the temperature value:", format="%.2f")
    from_unit = st.selectbox("Convert from:", ["Celsius", "Fahrenheit", "Kelvin"])
    to_unit = st.selectbox("Convert to:", ["Celsius", "Fahrenheit", "Kelvin"])

    # Convert Button
    if st.button("Convert"):
        result = convert_temperature(value, from_unit, to_unit)
        st.success(f"{value} {from_unit} is equal to {result:.2f} {to_unit}")

if __name__ == "__main__":
    main()