What is the difference between store and push?

[zchuanru]

Hi All, can anyone explain what is the difference between push and store?

//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./SimpleStorage.sol";

contract StorageFactory {

    SimpleStorage[] public SimpleStorageArray;

    function createSimpleStorageContract () public {
        SimpleStorage simpleStorageVar = new SimpleStorage ();
        SimpleStorageArray.push(simpleStorageVar);
    }

    function sfStore (uint256 _storageIndex, uint256 _storageNum) public {
        SimpleStorage simpleStorageVar2 = SimpleStorageArray[_storageIndex];
        simpleStorageVar2.store(_storageNum);
    }

    function sfGet (uint256 _storageIndex) public view returns (uint256) {
        SimpleStorage simpleStorageVar3 = SimpleStorageArray[_storageIndex];
        return simpleStorageVar3.retrieve();
    }

}

The two lines below:

SimpleStorageArray.push(simpleStorageVar);

simpleStorageVar2.store(_storageNum);

Thanks!

[ScottTan98]

when u using an array , you must then using push function to put the data into that array.
For the store function, is more likely to just simple store the value to the assign places (for this case will be the storageNum)

[cromewar]

Nice answer!! @ScottTan98

[zchuanru]

Thank you for the answer!

So push is used for "storing data" in an array

But store is used for "storing data" in a variable?

Is my understanding correct?

[cromewar]

Yes you are right

[zchuanru]

Thanks cromewar!