None (Software)

In software, "None" is a special value used to indicate the absence of a value or that something is empty or undefined. It’s similar to saying "nothing here" or "no data." For example, if a program expects a user to enter a name but the user leaves it blank, the program might store "None" to represent that no name has been provided. "None" helps programmers check if a variable has been assigned meaningful data or if it remains empty, aiding in controlling the flow and logic of a program.