What are reference variables in C++?

Can you explain what reference variables are in C++?

Sure! In C++, a reference variable is an alias for another variable. It allows you to access the original variable without copying its value.

How do I declare a reference variable?

You declare a reference variable by using the ampersand (&) symbol. For example: int &ref = original;.

What are the benefits of using reference variables?

Reference variables provide a way to modify the original variable directly, save memory by avoiding copies, and improve performance.

Can reference variables be null?

No, reference variables must always refer to a valid object or variable; they cannot be null.