But in a ranking from -10 to 10 there are 21 places.The Spartan E1337 said:I think 0 is a concept more than an actual number. It signifies that you have nothing. You can't put a numerical value on a concept, and you need a numerical value to classify something as even or odd.
ten negative, ten positive, and zero
Zero holds a place in the number line.
Zero is also an integer because integers are all whole numbers including negatives positives and zero.
If 10 20 30 40 are even, then the designator -0 makes it even
So just because the first number in this instance (zero) has no value it still exists as a number. if both 1 and -1 are odd then zero must be even.