# 智能合约-1.值和类型

**Published by:** [Murraya](https://paragraph.com/@murraya/)
**Published on:** 2022-05-07
**URL:** https://paragraph.com/@murraya/1

## Content

值和类型// SPDX-License-Identifier: MIT pragma solidity ^0.8.7; // Data type contract Valuetypes { bool public b = true; uint public u = 123; // [0, 2^256-1] 默认256位 int public i = -123; // int = int256 -2**255 to 2**255-1 int public minInt = type(int).min; int public maxInt = type(int).max; address public addr = 0x6EB72C67086D5487Dc1C27800afa6d63a3E14c75; // 16进制数字 // bytes32 public b32 = } 函数// SPDX-License-Identifier: MIT pragma solidity ^0.8.7; contract FunctionIntro { function add(uint x, uint y) external pure returns (uint){ return x + y; } function sub(uint x, uint y) external pure returns (uint){ return x - y; } }

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