LEARN SOLIDITY LESSON 2: Math Operations. Structs. Arrays in solidity

LEARN SOLIDITY LESSON

Math Operations. Structs. Arrays in solidity

Math Operations in Solidity

Math in Solidity is pretty straightforward. The following operations are the same as in most programming languages:

pragma solidity >=0.5.0 <0.6.0;

contract HelloWorld {    uint x2 = 5 + 2;  //= 7    uint x1 = 5 ** 2; //5^2 = 25    uint x2 = 13 % 5; //= 3}

Structs and Arrays in Solidity

Structs

Structs allow you to create more complicated data types that have multiple properties.

struct Person {
  uint age;
  string name;
}

Arrays

When you want a collection of something, you can use an array. There are two types of arrays in Solidity: fixed arrays and dynamic arrays:

uint[2] fixedArray;
string[5] stringArray;

uint[] dynamicArray;struct Person {
  uint age;
  string name;
}Person[] people;

Structs and Arrays
struct Person {
  uint age;
  string name;
}Person[] public people;Person satoshi = Person(172, "Satoshi");
people.push(satoshi);