None (mathematics)

In mathematics, "None" typically refers to the absence of a value or a null object, often represented as "null," "nil," or "None" in programming languages. It indicates that a variable or element does not contain any meaningful data or has no assigned value. Unlike zero or an empty list, "None" explicitly signifies "nothing" or "nothingness," serving as a placeholder when a value is missing or undefined. This concept helps programmers and mathematicians handle cases where data or results are intentionally absent or unknown.