How to use the useContext Hook in React?

To use the useContext Hook in React, follow these steps:

Import the useContext Hook from the React library by adding the following line at the top of your file:

import React, { useContext } from 'react';

Create a context using the createContext function. This function takes an initial value as an argument and returns a Provider and Consumer components. Define this context at the top of your file:

const MyContext = React.createContext(initialValue);

Wrap your application or component tree with the Provider component and pass in the value you want to share with all descendant components:

<MyContext.Provider value={myValue}>
  <App />
</MyContext.Provider>

Use the useContext Hook inside any functional component where you want to access the context data. Pass in the context you created earlier as an argument to the useContext Hook:

const myValue = useContext(MyContext);

Now you can use the myValue variable to access the data stored in the context throughout your component.

Remember that the useContext Hook can only be used in functional components. If you are working with class components, you can use the Consumer component provided by the context to access the context data.