Lesson 2: Storage Factory, variable simplestorage not initialised

[manavnotnani]

In function createSimpleStorageContract(), the compiler is telling that simplestorage is not initialized above. But I can see it is running in the course. idk why my code is showing error?

[cromewar]

hello @manavnotnani thats strange, make sure you don't have a typo on simpleStorageArray.push(simpleStorage);, anyways could you share your code in order we could review it please?

[manavnotnani]

I checked that thrice. It didn't have any typo error. Please tell whether we have to initialize a variable before using it in function or it can be done in function itself( I'm taking about public scope variable)

[cromewar]

You should initialize the simple storage array before indeed.

[widmung89]

I seem to get that same error as well when I do:

import "./SimpleStorage.sol";

contract StorageFactory {
    function createSimpleStorageContract() public {
        SimpleStorage simpleStorage = new SimpleStorage();
    }

}

How do I resolve the error message for Unused local variable?

[cromewar]

Well you should just use that variable, if you continue with the course you'll see that the function will be:

   function createSimpleStorageContract() public {
        SimpleStorage simpleStorage = new SimpleStorage();
        simpleStorageArray.push(simpleStorage);
    }

So as you are using the variable right after declaring it, the warning will disappear.