# How do I add commas to a number for clarity?

In large numbers, **commas** are used to help the reader.

A comma is placed every third digit to the left of the decimal point and so is used in numbers with four or more digits. Continue to place a comma after every third digit. For example:

*$1,000,000*(one million dollars)*123,456*(one hundred and twenty-three thousand, four hundred and fifty-six)