Integer constants are usually arithmetically written integers without decimal points, and consist of Arabic numerals 1234567890. Integer constants include positive numbers, negative numbers and 0. A constant is a quantity whose value remains constant from the beginning to the end of a program.

Integer variables are represented by variable names. The values of integer variables may change from the beginning to the end of the program, such as operations and inputs. Like x, y, z in algebra.

There are integer constants and integer variables in all programming languages, which are the most commonly used and common types.