收到警告：solidity-unnamed-return-variable-can-remain-unassigned

// SPDX-License-Identifier: GPL-3.0-or-other

pragma solidity >= 0.7.0 < 0.9.0;

contract Factorial
{
   uint num;

   constructor ()
   {
       num = 0;
   }

   function setNumber (uint newNum) public 
   {
       num = newNum;
   }
   
   function findFactorial () public returns (uint)
   {
       uint fact = 1;
       while (num > 0)
       {
           fact = fact * num;
           num--;
       }
       return fact;
   }
}

我沒有看到以下程式碼的任何警告（在 Remix 上測試）：

// SPDX-License-Identifier: GPL-3.0-or-other
pragma solidity >= 0.7.0 < 0.9.0;

contract Factorial { 

   uint num;

   constructor ()
   {
       num = 0;
   }

   function setNumber (uint newNum) public 
   {
       num = newNum;
   }

   function findFactorial () public returns (uint)
   {
       uint fact = 1;
       while (num > 0)
       {
       fact = fact * num;
       num--;
       }
       return fact;
   }
}

我沒有看到以下程式碼的任何警告（在 Remix 上測試）：

引用自：https://ethereum.stackexchange.com/questions/137940