It's already there.
9
0.40000000000000036
2,138.5 rounded to the nearest integer is 2,139
8.995 rounded off to the nearest integer is 9
To the nearest integer, 42 To the nearest ten, 40
To the nearest integer, 9
It is: 9
To the nearest integer, 9
It is: 9
Oh, dude, when you're talking about the upper and lower bounds of 9 to the nearest integer, you're basically asking for the numbers closest to 9, right? So, the upper bound would be 10 because it's the next whole number above 9, and the lower bound would be 9 because, well, it's 9. Like, it's not rocket science, man.
9
To the nearest integer, 9.
9
0.40000000000000036
-39, itself, is the nearest integer.
The nearest integer to 13.5 is 14.
It is not an integer, nor can it ever be an integer. It can, however, be rounded to the nearest integer, in which case 0.1 will round to 0 to the nearest integer.