Index

Chapter 5: Structs

Sometimes you need a more complex data type. For this, Solidity provides structs:

struct Person {
uint age;
string name;
}

Structs allow you to create more complicated data types that have multiple properties.
Note that we just introduced a new type, string. Strings are used for arbitrary-length UTF-8 data. Ex. string greeting = "Hello world!"

Put it to the test

In our app, we're going to want to create some zombies! And zombies will have multiple properties, so this is a perfect use case for a struct.
1. Create a struct named Zombie.

2. Our Zombie struct will have 2 properties: name (a string), and dna (a uint).

pragma solidity ^0.4.25;

contract ZombieFactory {

    uint dnaDigits = 16;
    uint dnaModulus = 10 ** dnaDigits;

    struct Zombie {
        string name;
        uint dna;
    }

}