structs.md

title	actions	material
Structs	checkAnswer hints	editor language startingCode answer sol pragma solidity >=0.5.0 <0.6.0; contract ZombieFactory { uint dnaDigits = 16; uint dnaModulus = 10 ** dnaDigits; // start here } pragma solidity >=0.5.0 <0.6.0; contract ZombieFactory { uint dnaDigits = 16; uint dnaModulus = 10 ** dnaDigits; struct Zombie { string name; uint dna; } }

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).