The Conroy & Conroy Subroutine Library (2021.3 edition)

Set_Of_Alpha
What: set, array, or list
File: Typedefs
Layer: 0
Platforms: C, C++, C#, Javascript, Pascal (all), PHP, Python

A set of letters - both uppercase (A-Z) and lowercase (a-z). A set in Pascal, Javascript, and C++. A list in Python. An array in C, C#, and PHP.