is-odd & is-even REST API
https://is-odd-even.herokuapp.com/isodd?number=3
{"result":true}
https://is-odd-even.herokuapp.com/iseven?number=3
{"result":false}
https://is-odd-even.herokuapp.com/isodd?number=3
{"result":true}
https://is-odd-even.herokuapp.com/iseven?number=3
{"result":false}