In programming, which term describes a memory location that can hold a value and be modified during runtime?

• A. Constant
• B. Variable
• C. Function
• D. Macro

Answer: (B)

A variable is a memory location that can hold a value and be modified during runtime. You declare a variable to reserve space, assign it a value, and then you can change that value as the program runs. This mutability and the existence of a storage slot distinguish it from other constructs. A constant, once set, does not change. A function is a block of code that performs a task, not a mutable data holder. A macro expands code during compilation rather than representing a runtime memory location that stores a value. So a variable best fits the description.