Integer

A whole number. The following are integers: 01 -125144457In contrast, the following are not integers: 5.34-1.01.3E4 “string”The first three are floating-point numbers; the last is a character string. Integers, floating-point numbers, and character strings constitute the basic data types that most computers support. There are often different sizes of integers available; for example, PCs support short integers, which are 2 bytes, and long integers, which are 4 bytes.