How to print the content of current window using JavaScript ?

The task is to print the content of the current window by using the window.print() method in the document. It is used to open the Print Dialog Box to print the current document. It does not have any parameter value. 
Syntax:

window.print()

Parameters: No parameters are required

Returns: This function does not return anything

Example: This example representing how to print the content of current window using JavaScript. 

html

<h1>Hello GeeksForGeeks Users</h1>

<h3>
    Print the content of the current
    window using HTML and JavaScript
</h3>

<form>
    <input type="button" value="Print" onclick="print_current_page()" />
</form>

<script type="text/javascript">
    function print_current_page() {
        window.print();
    }
</script>

Output: