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 CALCULATOR BY FSA")

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

choice = st.radio("Select your choice",("ADD","SUBTRACT","MULTIPLY","DIVIDE"))

if choice=="ADD":
  result =  add(num1,num2)
elif choice=="SUBTRACT":
  result = sub(num1,num2)
elif choice=="MULTIPLY":
  result = multiply(num1,num2)
elif choice=="DIVIDE":
  result = divide(num1,num2)

st.write("Result is: ",result)