For this exercise, create a JavaScript file and an HTML file on your machine. Import the .js file into the .html file, and then open the HTML file in your browser. You can then see the output in the browser's console. Command + shift + j on macOS or control + shift + j on a Windows computer will open the browser console.

For this exercise, determine the output for the following statements:

// 1. 5 ?? 100

// 2. 0 ?? null

// 3. null ?? 5

// 4. null ?? undefined