Key properties of a stack

Now that we know what a stack is and why it is such a useful data structure let's look at its different properties and useful components. These properties are modified when we add or remove data to or from the stack.

Capacity

A stack's capacity is the maximum number of data items it can hold. Only bounded stacks have a predefined capacity. Unbounded stacks ideally have an unlimited capacity restricted only by the amount of memory available on the system where the code executing the stack implementation is running.