Program:
Output:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.8.1/css/all.css"
integrity="sha384-50oBUHEmvpQ+1lW4y57PTFmhCaXp0ML5d60M1M7uH2+nqUivzIebhndOJK28anvf" crossorigin="anonymous">
<!-- CSS only -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/css/bootstrap.min.css"
integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossorigin="anonymous">
<!-- JS, Popper.js, and jQuery -->
<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js"
integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous">
</script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js"
integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous">
</script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.min.js"
integrity="sha384-OgVRvuATP1z7JjHLkuOU7Xw704+h835Lr+6QL9UvYjZE3Ipu6Tp75j7Bh/kR0JKI" crossorigin="anonymous">
</script>
<title>Grid System in Bootstrap4</title>
</head>
<body>
<nav class="navbar navbar-expand-sm navbar-dark bg-success">
<a class="navbar-brand" href="#">Grid System in Bootstrap4</a>
<button class="navbar-toggler" data-toggle="collapse" data-target="#navbarNav">
<span class="navbar-toggler-icon"></span>
</button>
</nav>
<div class="container mt-5">
<!--########################START HERE#########################-->
<!-- AUTO LAYOUT COLUMNS -->
<div class="container border">
<div class="row bg-info border">
<div class="col border">
1 of 2
</div>
<div class="col border">
2 of 2
</div>
</div>
<div class="row bg-primary border">
<div class="col border">
1 of 3
</div>
<div class="col border">
2 of 3
</div>
<div class="col border">
3 of 3
</div>
</div>
</div>
<!-- RESPONSIVE CLASSES -->
<div class="row border mt-5">
<div class="col bg-primary border">col</div>
<div class="col bg-secondary border">col</div>
<div class="col bg-success border">col</div>
<div class="col bg-danger border">col</div>
</div>
<div class="row border">
<div class="col-8 bg-warning border">col-8</div>
<div class="col-4 bg-info border">col-4</div>
</div>
<!-- NESTING GRIDS -->
<div class="row border bg-success mt-5">
<div class="col-sm-9 bg-primary border">
Level 1: .col-sm-9
<div class="row ">
<div class="col-8 col-sm-6 bg-warning border">
Level 2: .col-8 .col-sm-6
</div>
<div class="col-4 col-sm-6 bg-danger border">
Level 2: .col-4 .col-sm-6
</div>
</div>
</div>
</div>
</div>
<div style="margin-top:500px;"></div>
<!-- BODY ENDS -->
</body>
</html>
Output:
