useState in react

What is useState in React?

useState is a React Hook that allows you to add and manage state in functional components. It returns the current state value and a function to update it. When the state changes, the component automatically re-renders to reflect the new data.

Syntax of useState :

const [stateVariable, setStateFunction] = useState(initialValue);

• stateVariable – The current state value.
• setStateFunction – A function used to update that state.
• initialValue – The starting value of the state.

Example: Basic Counter Using useState

import React, { useState } from "react";

function Counter() {
  // Declaring a state variable 'count' with an initial value of 0
  const [count, setCount] = useState(0);

  return (
    <div>
      <h2>Count: {count}</h2>
      <button onClick={() => setCount(count + 1)}>Increment</button>
    </div>
  );
}

export default Counter;