C++ References

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In C++, a reference is a type of variable that acts as an alias to another object or value. References are often used to pass arguments to functions by reference, which allows the function to modify the original value. To create a reference in C++, you use the '&' symbol followed by the type and the reference name. For example, to create a reference to an integer variable, you would write "int& ref = variable;". Once a reference is created, it must be initialized with the object or value it refers to, and it cannot be changed to refer to a different object or value. Additionally, references cannot be null, so they must always refer to a valid object or value. Overall, references in C++ provide a powerful way to work with data and can be particularly useful for function parameters and return values.