Solidity if 语句
1. 语法
if (条件表达式) { 被执行语句(如果条件为真) }
2. 示例
展示 if 语句用法:
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; contract SolidityTest { uint storedData; constructor() { storedData = 10; } function getResult() public pure returns(string memory){ uint a = 1; uint b = 2; uint result = a + b; return integerToString(result); } function integerToString(uint _i) internal pure returns (string memory) { if (_i == 0) { // if 语句 return "0"; } uint j = _i; uint len; while (j != 0) { len++; j /= 10; } bytes memory bstr = new bytes(len); uint k = len - 1; while (_i != 0) { bstr[k--] = byte(uint8(48 + _i % 10)); _i /= 10; } return string(bstr);// 访问局部变量 } }
运行上述程序,输出结果:
0: string: 3
Solidity if…else 语句: 1. 语法if (条件表达式) { 被执行语句(如果条件为真)} else { 被执行语句(如果条件为假)} 2. 示例展示 if...else 语句用 ...