To balance needs of space and accuracy. For a start, having a separate data type for integer is necessary for accuracy - if, for example, you add and subtract lots of numbers with floating-point numbers, you will get accumulated errors. On the other hand, and especially when using sets of many numbers (like arrays), the need to save space becomes important, so you would try to use the number that uses just the amount space you need for a particular purpose, but not more. For example, for a grade that can only have integer values between 0 and 100, a single byte variable is enough, so there is no need to use the larger data types, that use up 2, 4, or even 8 bytes.
An integer is any whole number
The set of whole numbers is not closed under division by a non-zero whole number. Rational numbers provide that closure and so enable the definition of division of one integer by a non-zero integer.
The largest integer that is not the product of two or more different primes would be the largest prime number. Because there are an infinite number of prime numbers, there is no largest integer that is not the product of two or more different primes.
Whole numbers are integers. Integers are whole numbers.
Integer are whole numbers. As 63.46 is not a whole number, it is not an integer.
Yes. "Integer" includes positive numbers, negative numbers, and zero.
non integer rational numbers means the numbers in p/q form and this value is not a perfect integer. ex: 22/7
Always. "Whole number" and "integer" are two different names for the same thing.
71 is, itself an integer but to find a difference you require 3 numbers.71 is, itself an integer but to find a difference you require 3 numbers.71 is, itself an integer but to find a difference you require 3 numbers.71 is, itself an integer but to find a difference you require 3 numbers.
Integer numbers : ...-5,-4,-3,-2,-1,0,1,2,3,4,5... Float numbers 1.25, 1.26 etc They are float numbers because its value can be altered after the point, which is based on an integer number.
Integer numbers are a subset of real numbers. Real numbers may contain fractions.
no, all negative numbers are smaller than positive numbers