Number - Integer - <math>\mathbb{Z} </math>

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1 - About

An integer is the part of a number that is located at the left of the radix point.

In other word, it's a number without its fractional component.

Negative numbers without fractional components are still considered integers.

God made the integers; all else is the work of man

In a database, Integer means generally that the column shall be able to exactly represent integer values (i.e., values in increments of 1) in the range of at least <math>-2^{n − 1}</math> to <math>2^{n − 1} − 1</math>, where n is 64.


3 - Example


In this example, 13 is the integer.

4 - Property

Since the non-zero denominator q of the rational number may be equal to 1, every integer is a rational number.

5 - Function

6 - Size

Integer max size is on some computer define by the size of a word.

This limitation may cause programs to crash. For example, if a programmer using the C language incorrectly declares as int a variable that will be used to store values greater than <math>2^{15}−1<math>, the program will fail on computers with 16-bit integers. That variable should have been declared as long, which has at least 32 bits on any computer.


7 - Documentation / Reference