Which term describes reusable steps that return a value?

• A. Functions
• B. Parameters
• C. Global variables
• D. Library routines

Answer: (A)

Reusable blocks of code that return a value are called functions. A function encapsulates a task, can be used from different parts of a program, and produces a result you can use in expressions orAssign to a variable. It may take inputs (parameters) to influence its result and then returns a value when it finishes. For example, a function that computes the square of a number takes the input and returns the computed result.

Parameters are just the inputs given to a function, not the reusable block itself. Global variables are storage locations accessible from anywhere in the program, not blocks of code that perform a task. Library routines are prewritten code that can include functions or procedures; the exact concept described here—reusable steps that return a value—best matches the idea of a function.