👉 Enumerations are a type of programming concept where a set of values is stored in memory, and their order is determined by the input value. These values can be used to perform operations on arrays or other types of data structures. For example, if we have an array `arr` with elements `[1, 2, 3]`, we can use an enumeration to store them as follows: ```c enum MyEnum { A, B, C }; ``` In