Solidity Language Basics
Solidity
If you are familiar with C based language, it will be a breeze.
If
if (<boolean expr>) {
cond
} else if (...) {
} else {
}loops
for (uint i = 0; i < 10; ++i) {
...
}contracts
Basic building block
contract Name {
...
uint foo = 5;
constructor() {
// I am called once at contract deploy
}
function name() scope returns(type) {
...
}
}Simple Types
uint = 256 bit number uint8, uint16, uint32, ...
strings suck
arrays
- there are dynamic and static
contract Foo {
uint[] foo; // Hello I am dynamic
function foofoo() public view {
uint[] fooo = new uint[](10); // I am fixed array
}
}maps
- these are much different. You cannot iterate.
contract Foo {
mapping(uint => address[]) mymap;
}structs
- Just like c
struct Foo {
uint a;
uint16 b;
uint8 c;
}
mapping(uint => Foo) mymap;
Foo[] myarr;The language is simple, the concepts are hard
- You can learn everything you ever wanted from Solidity. So it seems a bit redundant to just recreate the same tutorial. Lets make something instead.
- As we build we will learn