In React.js, the import statement is used to bring functionalities from other modules into the current module. It’s a key part of modular JavaScript development and allows you to organize your code into separate files and reuse functionalities across different parts of your application.

There are several ways to use import in React.js:

1. Default Imports:
   You can import the default export from a module using the import keyword followed by the name you want to assign to the default export. Example:

   import MyComponent from './MyComponent';

2. Named Imports:
   You can import specific named exports from a module using the {} syntax. Example:

   import { MyComponent1, MyComponent2 } from './MyComponent';

3. Combining Default and Named Imports:
   You can also import both default and named exports from the same module. Example:

   import MyDefaultComponent, { MyComponent1, MyComponent2 } from './MyComponent';

4. Importing All Named Exports as an Object:
   You can import all named exports from a module as properties of an object using the * as syntax. Example:

   import * as MyComponents from './MyComponent';

5. Importing Stylesheets:
   You can import CSS or SCSS stylesheets into your components using the import statement. This allows you to apply styles defined in external stylesheets to your React components. Example:

   import './styles.css';

These are some of the common ways you can use the import statement in React.js to bring in functionalities, components, or stylesheets from other modules into your application. It’s an essential part of building modular, reusable, and maintainable React applications.