app.py

import streamlit as st

def add(x,y):
  return x+y

def sub(x,y):
  return x-y

def multiply(x,y):
  return x*y

def divide(x,y):
  if y == 0:
     return "sorry not possible"
  else:
     return x/y

st.title ("simple calcy byb mks")

num1 = st.number_input("enter first number")
num2 = st.number_input("entr second number")

choice = st.radio("selectv your choice",("add","sub","multiply","divide"))

if choice == "add":
  result = (add(num1,num2))
elif choice == "substract":
  result = (sub(num1,num2))
elif choice == "multiply":
  result = (multiply(num1,num2))
elif choice == "divide":
  result = (divide(num1,num2))

st.write("result is", result)