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contracts...SimpleStorage.sol

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.3;

contract SimpleStorage{
    uint256 age;

    struct Humans{
        uint256 age;
        string name;
    }

    Humans [] public boys;
    mapping(string=>uint256) public humansByName;

    function incrementAge(uint256 _age) public virtual{
        age=_age;
    }

    function getAge() public view returns (uint256){
        return age;
    }

    function addPeople(string memory _name, uint256 _age) public{
        boys.push(Humans(_age,_name));
        humansByName[_name]=_age;
    }
}