To run the code, you can click on the Run code button in the code editor and that would run the code.
However, you can also run the code without using the mouse.
If you are using Windows, then press Ctrl and then hit Enter to run the code.
If you are using Mac, then press Command and then hit Return to run the code.
By pressing the ESC key, you can take the focus out of the editor, and using the E key you can re-focus into the editor.
If you are using Windows, then use Ctrl + Shift + i to format the code
If you are using Mac, then use Cmd + Shift + i to format the code
Now try running the code given below without clicking on the Run code button.
Here's a video explaining the same process.