In React, functional state variables are used to store and manage data within a functional component. They allow you to create components that can hold and update their own internal state without needing to convert them into class components. Functional state variables are typically declared using the useState hook, which is a built-in hook provided by React.
To use functional state variables, you first import the useState hook from the 'react' package. Then, within your functional component, you call the useState hook and provide an initial value for your state variable. The useState hook returns an array with two elements: the current state value and a function to update that value.
Here's an example of using functional state variables in a React component:
import React, { useState } from 'react';
function Counter() {