08-Solidity8.0-变量的默认值

pragma solidity ^0.8.7;

contract Counter{
    bool public b;//false
    uint public u;//0
    int public i;//0
    address public a;//0x0000000000000000000000000000000000000000
    bytes32 public b32;// 0x0000000000000000000000000000000000000000000000000000000000000000

}
  

部署合约运行结果：