contracts...MyContract-arrays.sol

pragma solidity ^0.6.0;

// "SPDX-License-Identifier: unsure"

// lesson 3 - arrays

contract MyContract {
    uint[] public uintArray = [1,2,3];
    string[] public stringArray = ['apple', 'banana', 'carrot'];
    string[] public values;
    uint[][] public array2D = [ [1,2,3], [4,5,6] ];

    function addValue(string memory _value) public {
        values.push(_value);
    }

    function valueCount() public view returns(uint) {
        return values.length;
    }

}