Reference Types In Solidity

The Solidity data types can be classified according to the data location. If a variable stores its own data; it is a value type. If it holds a location of the data; it is a reference type. We have gone through value types in previous articles. So, in this article, we will learn about reference types.

source https://www.c-sharpcorner.com/article/reference-types-in-solidity/