Reference Variable

References

C++ added the so-called references variables.A references is an alias,or an alternate name to exiting variable.

The main use of references is acting as function formal parameters to support pass-by-reference. In a reference variable is passed into a function are rejected outside the function, the function works on the original copy. Changes inside the function are reflected outside the function.

A reference is similar to pointer.In many cases, a reference can be used as alternative to pointer, In particular for the function parameter.

References(&)-

C/C++ use & to denote the address of operator in an expression. C++ assign an additional meaning to & in declaration to declare a reference variable.

Syntax:

type &newName = existingName;

//or

type& newName = existingName;

//or

type & newName = existingName;

 "newName is reference to existingName", or "newName is an alias of existingName". Now refer to the variable as newName or existingName.

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