👉 In programming, an "arithmetical" or "arithmatic" operation is a mathematical operation that involves addition, subtraction, multiplication, and division. It is often used in arithmetic operations to manipulate numbers and perform calculations on them. For example, the modulo operator (%) is an arithmetical operation that returns the remainder of dividing two numbers. In computer science, an "arithmetical" or "arithmatic" data structure is a collection of values that can be manipulated using mathematical operations.