Solidity data types can broadly be classified in the following two types:
- Value types
- Reference types
These two types in Solidity differ based on the way they are assigned to a variable and stored in EVM. Assigning a variable to another variable can be done by creating a new copy or just by coping the reference. Value types maintains independent copies of variables and changing the value in one variable does not effect value in another variable. However, changing values in reference type variables ensures that anybody referring to that variables gets updates value.
