Mastering Blockchain Programming with Solidity

Declaring state variables

The state variables defined in contract are values that are permanently stored in contract storage over the Ethereum blockchain. The variables defined outside of the method/function body are accessible to the whole contract. Based on the visibility defined for the variable, it may or may not be further accessible from other inherited contracts.

Defining a storeUint variable of the uint type is done as shown in the following code:

contract VariableStorage {    uint storeUint; //uint256 storage variable    //...}

The storeUint variable in the preceding code block will be accessible from any function/modifier defined in the VariableStorage contract.