asterisk's

[Vania]

Asterisk is a symbol that represents an unknown or missing information. In programming, it is used to indicate that a specific variable or function has not been defined. It is commonly used in object-oriented programming to represent a class or interface that has not been implemented. In the context of data structures, an asterisk is used to indicate that a specific element has not been added or removed from an array.
In summary, the asterisk is a useful tool in programming as it helps to identify the absence of information or functionality in a system.