Solution: lb_diamond

Here is the commented solution for this project.

1. Create a file named lb_diamond.js.

   $ touch lb_diamond.js

2. Open the file with a text editor and declare a variable named size.

   lb_diamond.js

   const size = 3;

3. Check if the size is less than or equal to zero and output an error message.

   lb_diamond.js

   const size = 3;if (size <= 0) {