Why two lines do not want to line up in different directions and how to do it?

Question

HTML

<header>
    <div class="container">
        <div class="row">
            <div class="col-lg-2 left">
                <h3>Roma Tuzov</h3>
            </div>
            <div class="col-lg-10 right">
                gdfsfs
            </div>
        </div>
    </div>
</header>

Above is the code, according to the idea, it should align the left side to the left side, and the right side, respectively, to the right side. What's wrong, why do they just stand next to each other?

Answer 1

Your question is strange. They are without the classes left and right, col-lg-2 will become on the left anyway, and col-lg-10 on the right