Web Reference: Jul 26, 2025 · In C++, functions can return references to variables. This is especially useful when you need to return large data structures or want to allow direct modifications to a variable inside a function. When a reference is created, you must tell it which variable it will become an alias for. After you create the reference, whenever you use the variable, you can just treat it as though it were a regular integer variable. A reference variable is an alias, that is, another name for an already existing variable. Once a reference is initialized with a variable, either the variable name or the reference name may be used to refer to the variable.
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