Mastering Blockchain Programming with Solidity

Dynamically sized byte arrays

In any programming language, you will need the support of strings for some specific needs. For string and dynamic length data, the Solidity language supports two types of dynamically sized byte arrays—the bytes and string data types. Neither are a value type, which means that their complete values are not copied when they are assigned to a new variable or passed to a function as an argument. However, their references are copied to a variable and arguments when passed to other functions.