End of Year 8 (EOY8) Computer Science Practice Exam

A variable is a named container in a program that holds data. It points to a location in RAM where a value is stored while the program runs, and that value can be changed as the program executes. The name lets you read or update the data easily—for example, keeping a score or a user’s input and changing it as needed. This differs from a constant, which is a fixed value that never changes, from hardware like a hard drive which is a storage device, and from a function, which is a block of code that does a task and returns a value. So the best description is a named memory location used to store values during execution.