app.py

import streamlit as st # type: ignore
st.title('Welcome to BMI Calculator')
weight = st.number_input('Enter you weight in kgs')

status = st.radio('Select your height format:',('cms','meters','feet'))

try:
    if status =='cms':
        height = st.number_input('Centimeters')
        bmi = (weight / ((height/100)**2))
    elif status== 'meters':
        height = st.number_input('meters')
        bmi =(weight / (height**2))     
    elif status =='feet':
        height =  st.number_input("feet")
        bmi = weight/((height*3.28)**2)
except:
    print('Zero Division error')

if(st.button('Calculate BMI')):
    result_bmi = format(round(bmi))
    st.write('Your BMI Index is:',result_bmi)
    if (bmi < 16):
        st.error('Extremely Underweighted')
    elif (bmi >= 16 and bmi < 18.5):
        st.warning('Underweighted')
    elif (bmi >= 18.5 and bmi < 23):
        st.success('Heelty')
    elif (bmi >= 23 and bmi < 30):
        st.warning('Overweighted')
    elif (bmi > 30):
        st.error('Extremely Overweighted')