Numbers spelled out
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Rule · bucket: judgment · severity: note · detector: none · since: v0.1.0
Section: UI writing
Group: Words

Forbidden:
  "eight hundred and ninety nine designers"

Instead:
  "899 designers". Numerals have a different shape to letters, so they are faster to find and read, and anyone looking for a figure expects a figure.

Format consistently: **1,000** not 1000. For very large numbers, mix numerals and words — **1 billion**, not 1,000,000,000 — so nobody has to count digits.