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Integers are whole numbers that go from negative infinity to positive infinity. As such, they do cover the negative range of the number line.
No, Negative Nine or -9 is not a natural number since natural numbers mean only those numbers which start from 1 to infinity. No negative integers are included in this category of numerals.
In maths there are positive and negative numbers. Positive numbers are all numbers that are greater than 0. e.g. 1, 9, 234, 0.123 Negative numbers are identified by a negative sign e.g. -2, -100, -2.75
A negative number is defined as a number that is less than zero. Positive numbers, on the other hand, are more than zero. You can see that positive numbers are greater than negative numbers because they are all above zero, which negative numbers are not.
No. "Natural numbers" only refers to integers greater or equal to zero, that is, non-negative integers.