No -5.3 is not an integer because it is not a whole number
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It is already rounded to the nearest integer.
Another way of asking this question is "What is the square root of x." In this case, we're talking about x = 53, but the question is the same. So to find the number that, when multiplied by itself, equals, 53, we must take the square root of 53. Since 53 is not a square number, our answer is not an integer, but close to 7.28.
an integer plus and integer will always be an integer. We say integers are closed under addition.
If the integer subtracted is smaller than or equal to the first integer, then the answer is positive. Otherwise, if the integer subtracted is larger, then the answer is negative.
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.