👉 Permutation, in mathematics and computer science, refers to a way of arranging elements from a set into a sequence. It is one of the fundamental concepts in combinatorics, which deals with counting problems involving finite sets. In the context of permutations, the order in which elements are arranged matters. For example, if you have 5 cards (A, B, C, D, E), and you want to arrange them into a sequence, you can think of each card as an element of
