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Solidity by Example
version 0.8.3

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Constants

Constants are variables that cannot be modified.

Their value is hard coded and using constants can save gas cost.

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.3;

contract Constants {
    // coding convention to uppercase constant variables
    address public constant MY_ADDRESS = 0x777788889999AaAAbBbbCcccddDdeeeEfFFfCcCc;
    uint public constant MY_UINT = 123;
}

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