Email - Handling Multiple Checkboxes For Email Bod

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   I currently have a form that allows a Course Registrant to select multiple course options from a list formatted with a checkbox.

My question regarding the checkboxes is what would be the best method to use to grab this information, for example a loop of all checked checkboxes, and then how to write the data in the email body to display the values (Course Name and Number) of only those courses checked off in the form?

Thanks.