What is used to store data in memory for later use by a program?

What is used to store data in memory for later use by a program?

• A. Variable
• B. Constant
• C. Pointer
• D. Array

Answer: (A)

A variable is a named storage location in memory that holds a value to be used later by the program. It can be read and updated as the program runs, making it the primary way to remember data, perform calculations, and track results across many steps. A constant serves as a fixed value that cannot change after it's set, so it isn’t suitable for data that needs to vary during execution. A pointer stores a memory address rather than the actual data, so it’s about referencing other data rather than storing the value itself. An array holds multiple values together, which is great for lists, but the fundamental unit for storing a single piece of data for later use is the variable.

A variable is a named storage location in memory that holds a value to be used later by the program. It can be read and updated as the program runs, making it the primary way to remember data, perform calculations, and track results across many steps. A constant serves as a fixed value that cannot change after it's set, so it isn’t suitable for data that needs to vary during execution. A pointer stores a memory address rather than the actual data, so it’s about referencing other data rather than storing the value itself. An array holds multiple values together, which is great for lists, but the fundamental unit for storing a single piece of data for later use is the variable.