How to add a new line in the alert box ?

To add a new line to the content of alert box we are going to use \n backslash(n). 

Example 1: This example adds \n between the 2 lines to the text of alert box. 

html

<h1 style="color:green;">
    GeeksforGeeks
</h1>
<p>
    Click on the button to pop
    alert box with added new line.
</p>
<button onclick="gfg_Run()">
    click here
</button>
<script>
    var text =
        "This is line 1\nThis is line 2";

    function gfg_Run() {
        alert(text);
    }
</script>

Output:

How to add a new line in the alert box ?

Example 2: This example adds \n among the 3 lines to the text of alert box. 

html

<h1 style="color:green;">
    GeeksForGeeks
</h1>
<p>
    Click on the button to pop
    alert box with added new line.
</p>
<button onclick="gfg_Run()">
    click here
</button>
<script>
    var text =
        "This is first line\nThis is "+
        "middle line\nThis is last line";

    function gfg_Run() {
        alert(text);
    }
</script>

Output:

How to add a new line in the alert box ?