Create Smart contract with new keyword

Demo.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.13;

// usage: one contract(client) deploys and creates a new insatnce of another contract(Demo) by using new keyword
contract Demo {
    uint private simpleUint;
    constructor() payable{}
    function getValue() public view returns(uint){
        return simpleUint;
    }

    function setValue(uint _value) public{
        simpleUint = _value;
    }
}

contract Client {
    function useNewKeyword() public returns(uint){
        Demo demo = new Demo();
        demo.setValue(10);
        return demo.getValue();
    }
}