Integer Integer An integer (from the Latin "integer" meaning "whole") is a number that can be written without a fractional component. For example, 21, 4, 0, and −2048 are integers, while 9.75, , and are not. The set of integers consists of zero (), the positive natural numbers (, , , …), also called "whole numbers" or "counting numbers", and their additive inverses (the negative integers, i.e., −1, −2, −3, …). The set of integers is often denoted by a boldface Z ("") or blackboard bold formula_1 (Unicode U+2124 ℤ) standing for the German word "Zahlen" (, "numbers"). The integers form
International Bank Account Number source code of the verification algorithm. An English language IBAN checker for ECBS member country bank accounts is available on its website. An IBAN is validated by converting it into an integer and performing a basic "mod-97" operation (as described in ISO 7064) on it. If the IBAN is valid, the remainder equals 1. The algorithm of IBAN validation is as follows: If the remainder is 1, the check digit test is passed and the IBAN might be valid. Example (fictitious United Kingdom bank, sort code 12-34-56, account number 98765432): According to the ECBS "generation of the IBAN SA1280000119608010928677 shall