React
import React from 'react' function changeuser() { let user ='Aditya'; console.log(user); function changename(){ user ="Aditya badiger"; console.log(user); } return ( The username is {user} change user ) } export default changeuser this code is not working because we store variables in a new way in react import React, { useState } from 'react' function App() { const [a, setA] = useState(1) return ( hello the number is {a} setA(a + 10)}>Incremenet setA(a-10)}>Decrement ) } export default App this code refers to creating variables