Numbers

Generally, one to nine are written as words. Anything larger than nine should be written as a numeral (10, 11, and so on). Use commas to separate thousand units: 1,000.

Exceptions to the above are:

• When starting a sentence.
• In the same sentence as higher numbers.
• In headings, buttons, and wherever space is very limited (not subheadings).
• In version numbers, dates, and times.
• Abbreviated units of measurement.
• Percentages.