Is this a typo? (SW's Pro. BJ)

Would appreciate help here.

Early in Chapter 3, The High Low System, There is a section titled "How to Truncate". It says "Truncation means keeping the integer and dropping everything after the decimal point."

That is very clear.

However in the example given for a negative index calculation, it says :

"If a count per deck of -1 is required to stand, and you have a count per deck of -1.2, then hit."

Isn't that an example of Flooring not Truncating ?

-1.9. -1.8, -1.7, -1.6, -1.5, -1.4, -1.3, -1.1 would all be truncated to the index -1. Wouldn't they ?
And they could be Floored to -2. (Rounded toward negative infinity).

So am not sure how to use the negative indexes in the book. Does it round -1.2 to -2 as in the example provided. Or does it truncate ("keeping the integer and dropping everything after the decimal point") as explained in the text ?

To truncate a positive mixed number or a negative mixed number to an integer, drop the fractional or decimal part. The negative numbers in your post all truncate to -1.

To floor a positive mixed number or a negative mixed number to an integer, replace the mixed number with the greatest integer less than or equal to the number, [n], which is often used in elementary calculus as an example of a piece-wise discontinuous function. The negative numbers in your post all floor to -2.

To round a positive mixed number, drop the fractional part if it is < .5; drop the fractional part and add 1 to the integral part if the fractional part is >= .5. To round a negative mixed number, drop the fractional part if it is < .5; drop the fractional part and subtract 1 from the integral part if the fractional part is >= .5. 1.49 rounds to 1, 1.5 rounds to 2, -1.49 rounds to -1 and -1.5 rounds to -2.