Question

When used as parameters, _________ variables allow a function to access the parameter’s original argument.

Short answer

Answer: Reference variables

Step-by-step solution

Understanding the concept of a variable used as a parameter in a function

A variable that is used as a parameter in a function is essentially an input that the function takes to perform its task. It allows the function to have access to the data that is passed to it when the function is called.

Identifying the type of variable required for accessing the original argument

The type of variable that is required here is one that can directly access or reference the original argument. This type of variable is called a 'reference variable.'

Completing the exercise

Now that we know the type of variable required, we can complete the sentence in the exercise. The completed sentence should be: When used as parameters, reference variables allow a function to access the parameter’s original argument.