formik_hook1.js

import React from "react";
import { useFormik } from "formik";

const initialValues = {
  name: "",
  email: "",
  address: {
    street: "",
    number: "",
    city: ""
  },
  password: "",
  confirmPassword: ""
};

const MyForm = () => {
  const onSubmit = values => {};

  const formik = useFormik({
    initialValues,
    onSubmit
  });

  return (
    <form>
      <input placeholder="Name" />
      <br />
      <input placeholder="Email" />
      <br />
      <input placeholder="Password" />
      <br />
      <input placeholder="confirm password" />
      <br />
      <input placeholder="Address" />
      <br />
      <input placeholder="City" />
    </form>
  );
};

export default MyForm;