None (computer programming)

In computer programming, "None" is a special value used to represent the absence of a meaningful value or no data at all. Think of it as a placeholder that indicates something is empty or hasn't been set yet. It's often used to check if a variable has been assigned a real value or to signal that no result exists. Unlike numbers or text, "None" doesn't carry information itself; it simply shows that nothing is there. This helps programmers manage and control the flow of their programs by clearly identifying missing or uninitialized data.