An Example to Demonstrate the Bootstrap Grid System

Here you will find An Example to Demonstrate the Bootstrap Grid System.

Below is an example of experimenting with the Bootstrap 4 grid system to create a page with multiple rows and columns, using different column sizes for different screen sizes.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
    <title>Bootstrap 4 Grid System Example</title>
</head>
<body>

    <div class="container">
        <h1 class="text-center mt-5">Grid System Example</h1>

        <!-- First Row -->
        <div class="row mb-4">
            <div class="col-md-4">
                <div class="card">
                    <div class="card-body">
                        <h5 class="card-title">Column 1</h5>
                        <p class="card-text">This is a column with a width of 4 on medium and larger screens.</p>
                    </div>
                </div>
            </div>
            <div class="col-md-4">
                <div class="card">
                    <div class="card-body">
                        <h5 class="card-title">Column 2</h5>
                        <p class="card-text">This is a column with a width of 4 on medium and larger screens.</p>
                    </div>
                </div>
            </div>
            <div class="col-md-4">
                <div class="card">
                    <div class="card-body">
                        <h5 class="card-title">Column 3</h5>
                        <p class="card-text">This is a column with a width of 4 on medium and larger screens.</p>
                    </div>
                </div>
            </div>
        </div>

        <!-- Second Row -->
        <div class="row">
            <div class="col-12 col-md-6">
                <div class="card">
                    <div class="card-body">
                        <h5 class="card-title">Column 1</h5>
                        <p class="card-text">This is a column with a width of 12 on small screens and 6 on medium and larger screens.</p>
                    </div>
                </div>
            </div>
            <div class="col-12 col-md-6">
                <div class="card">
                    <div class="card-body">
                        <h5 class="card-title">Column 2</h5>
                        <p class="card-text">This is a column with a width of 12 on small screens and 6 on medium and larger screens.</p>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <script src="https://code.jquery.com/jquery-3.5.1.slim.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.9.3/dist/umd/popper.min.js"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
</body>
</html>

In this example:

The first row contains three columns, each with a width of 4 on medium and larger screens (col-md-4).
Also, the second row contains two columns, each with a width of 12 on small screens and 6 on medium and larger screens (col-12 col-md-6).

Further Reading