app.py

import streamlit as st

# Function for temperature conversion
def convert_temperature(value, from_unit, to_unit):
    if from_unit == "Celsius" and to_unit == "Fahrenheit":
        return (value * 9/5) + 32
    elif from_unit == "Fahrenheit" and to_unit == "Celsius":
        return (value - 32) * 5/9
    elif from_unit == "Celsius" and to_unit == "Kelvin":
        return value + 273.15
    elif from_unit == "Kelvin" and to_unit == "Celsius":
        return value - 273.15
    elif from_unit == "Fahrenheit" and to_unit == "Kelvin":
        return (value - 32) * 5/9 + 273.15
    elif from_unit == "Kelvin" and to_unit == "Fahrenheit":
        return (value - 273.15) * 9/5 + 32
    else:
        return value

# Streamlit interface
st.title('Temperature Converter')
st.write('This app allows you to convert between Celsius, Fahrenheit, and Kelvin.')

# Input from the user
value = st.number_input("Enter the temperature value:", min_value=-273.15)
from_unit = st.selectbox("Select the unit to convert from:", ["Celsius", "Fahrenheit", "Kelvin"])
to_unit = st.selectbox("Select the unit to convert to:", ["Celsius", "Fahrenheit", "Kelvin"])

# Perform conversion
if st.button("Convert"):
    if from_unit != to_unit:
        result = convert_temperature(value, from_unit, to_unit)
        st.write(f"The converted temperature is {result:.2f} {to_unit}.")
    else:
        st.write("Please select different units for conversion.")