When learning React, one common question is: “If state changes, does React re-render?” The answer is yes . To understand this, first we need to know what useState does. What is useState? useState is a React Hook used to store and manage data inside a component. Example: const [count, setCount] = useState(0); Here: count -> stores the current value setCount -> updates the value 0 -> initial value Initially: count = 0 React renders the UI and displays: 0 What Happens When State Changes? Consider this counter example : import { useState } from " react " ; function Counter () { const [ count , setCount ] = useState ( 0 ); return ( <> < h1 > { count } </ h1 > < button onClick = { () => setCount ( count + 1 ) } > Increment </ button > </> ); } export default Counter ; Enter fullscreen mode Exit fullscreen mode When the button is clicked: setCount(count + 1) React updates the state.…