Unionary

Unionary refers to a specific type of operation in mathematics and computer science. It is a unary operation, meaning it operates on a single operand. This is in contrast to binary operations, which require two operands, or ternary operations, which require three.

A common example of a unary operation is negation. For instance, in arithmetic, the minus sign used to indicate a negative number or to reverse the sign of a number is a unary negation operator. If we have a number 'x', applying the unary negation operator results in '-x'. Another example is the factorial operation in mathematics, denoted by an exclamation mark (!). The factorial of a non-negative integer 'n', written as n!, is the product of all positive integers less than or equal to 'n'. This operation takes a single number as input.

In computer programming, unary operators are used extensively for tasks such as incrementing or decrementing a variable (e.g., `++x` or `--x`), logical negation (e.g., `!condition`), and bitwise complement (e.g., `~byte`). The key characteristic is that they modify or evaluate a single value without requiring a second or third value to perform their function. The syntax and specific meaning of unary operators can vary between different programming languages and mathematical contexts, but the fundamental concept of operating on one operand remains consistent.