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Consider this one-sentence paragraph with some text formatted in bold and italics:

Some words are bold, some are italic, and some are both.

How could you represent this as data in a word processor, spreadsheet, or presentation application?

Let’s begin with the text itself for the paragraph. Maybe we just use a string.

"Some words are bold, some are italic, and some are both."

The words are there, but we lost the formatting. Let’s break the sentence into a list of the formatted and unformatted parts. I use square brackets “[ ]” around the list and commas to separate the parts.

[ "Some words are ",
  "bold",
  ",some are ",
  "italic",
  ", and some are ",
  "both",
  "." ]

Now we can focus on how to embellish each part with formatting. There are four options:

1. the text...