Tag undefined

In programming, undefined is a primitive data type used to represent a variable or object that has not been assigned a value. When a variable is declared but not assigned a value, it has the value of undefined. Undefined can also be returned by functions when there is no explicit return value. Undefined is a commonly used value in programming, and understanding how it works is important for writing high-quality, bug-free code. If you’re looking to learn more about undefined and its applications in programming, our collection of undefined tutorials and resources can help you get started.