To add comments to MATLAB ® code, use the percent (%) symbol. Comment lines can appear anywhere in a code file, and you can append comments to the end of a line of code. For example: % Add up all the vector elements. y = sum(x) % Use the sum function. To comment out multiple lines of code, use the block comment operators, %{ and %}.

By the end, you’ll be well-equipped to manage comments in your MATLAB scripts effectively. One of the simplest ways to comment multiple lines in MATLAB is by using the comment block method. This approach allows you to comment out a section of your code without having to add the percentage symbol (%) at the beginning of each line.

Open your MATLAB script in the editor. Highlight the lines of code you wish to comment out. Click on the “Comment” button in the editor toolbar, or use the keyboard shortcut Ctrl + R (Windows) or Cmd + R (Mac). Here’s an example of how it looks: % This line will be executed disp('Hello, World!')

Although commenting code in MATLAB is straightforward, there are some pitfalls that are easy to fall into. Forget the % at the beginning: If the comment symbol is omitted, MATLAB will attempt to execute that line and will likely throw an error.