Why is row needed in bootstrap?

Question

css

What does the .row class in Bootstrap do? Why is he needed?

Answer 1

.row {
    margin-left: -.9375rem;
    margin-right: -.9375rem;
}

Compensates for column padding. Without row there will be padding between the edge of the container and the first and last columns in the row.

Answer 2

getbootstrap.com/css/#grid

Answer 3

It works like a clearfix, it clears the stream of floats, in our case it is "col-lg-n"
Where n is the size of the column, it is mainly used only if there are columns, that is
Container>row>col

Answer 4

To use the grid system, you will have to add the .row class to the main div.