U+2124 "ℤ" Double-Struck Capital Z Unicode Character

U+2124 "ℤ" Double-Struck Capital Z is a typographic symbol from the letterlike symbols block that represents the set of all integers in mathematical notation, deriving its distinctive double-struck or blackboard bold style from an old convention of using bold type for number sets. It is widely used in fields such as number theory, algebra, and discrete mathematics to denote the infinite set of whole numbers including negative numbers, zero, and positive numbers. The character is encoded separately from the standard Latin capital Z to serve a specific mathematical purpose and is distinct from the similar-looking but unrelated "Z" in the Mathematical Alphanumeric Symbols block.