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What would be a brief definition of a reference variable in C++?
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A reference variable is a variable that points to an object of a given class, letting you access the value of an object. An object is a compound data structure that holds values that you can manipulate. A reference variable does not store its own values.
A reference variable provides a new name to the existing variable. It is de-referenced implicitly and does not need a de-referencing operator(*) to retrieve the value referenced.
A reference variable provides a new name to an existing variable. It is dereferenced implicitly and does not need the dereferencing operator * to retrieve the value referenced. On the other hand, a pointer variable stores an address. You can change the address value stored in a pointer.
Variables is kinda label for the memory that stores the actual data. Pointers stored the address of the variables. References are alias for the variables.
A reference is an entity that is an alias for another object.
A reference is not a variable as a variable is only introduced by the declaration of an object. An object is a region of storage and, in C++, references do not (necessarily) take up any storage.
As objects and references are distinct groups of entities in C++ so the term "reference variable" isn't meaningful.
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A reference variable provides an alias (alternative name) for a previously defined variable. For example:
float total=100; float &sum = total; It means both total and sum are the same variables.
cout<< total; cout << sum; Both are going to give the same value, 100. Here the & operator is not the address operator; float & means a reference to float.
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