An integer is a whole number. There are lots of other numbers, such as fractions or rationals, and Irrational Numbers (such as the square root of 2)
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natural numbers can not be negative. integers can be both positive and negative.
The difference between a positive integer and a negative integer is ALWAYS positive.Suppose X and Y are positive so that -Y is negative,The the difference two numbers, A and B is A - B so the difference between X and (-Y) is X - (-Y) which equals X + Y. The sum of two positive numbers is always positive.
The problem must have given you a list of several whole numbers. The integer range is the difference in size (distance) between the biggest one and the smallest one.
A rational number is one that can be represented as an integer or a fraction with an integer over an integer. An irrational number cannot be represented using integers. Examples of rational numbers: 2, 100, 1/2, 3/7, 22/7 Examples of irrational numbers: π, e, √2
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