# add comma every 3 digits in r

To add a comma every three digits in R, you can use the `format()`

function. Here are the steps to accomplish this:

**Step 1**: Define your number or vector of numbers. Let's say you have a number`x`

or a vector`x`

containing multiple numbers.**Step 2**: Use the`format()`

function to format the number(s) with commas. The`format()`

function takes the following arguments:`x`

: The number or vector of numbers you want to format.`big.mark`

: The character to be used as the thousands separator. In this case, we'll use a comma`,`

.`scientific`

: A logical value indicating whether to use scientific notation for very large or small numbers. Set this argument to`FALSE`

to disable scientific notation.

Here is an example of how to use the `format()`

function:

```
R
formatted <- format(x, big.mark = ",", scientific = FALSE)
```

The `formatted`

variable will now contain the numbers with commas added every three digits.

**Step 3**: Print or use the formatted number(s) as desired.

That's it! By following these steps, you can add a comma every three digits to a number or vector of numbers in R.