Home »
JavaScript
Array fill() method with example in JavaScript
JavaScript fill() method: Here, we are going to learn about the fill() method of array in JavaScript.
Submitted by IncludeHelp, on March 02, 2019
JavaScript fill() method
fill() method is used fill the array with a given value.
Syntax:
array.fill(value, [start_index], [end_index]);
Parameters:
- value is a static value to be filled in the array.
- start_index is an optional parameter, it specifies the starting index to fill the array, its default value is 0.
- end_index is also an optional parameter, it specifies the ending index to fill the array, its default value is array.length.
Return value: None
Example:
Input:
var arr = [10, 20, 30, 40, 50];
Function call:
arr.fill(0);
Output:
0,0,0,0,0
JavaScript Code to demonstrate example of Array.fill() method
<html>
<head>
<title>JavaScipt Example</title>
</head>
<body>
<script>
var arr = [10, 20, 30, 40, 50];
document.write("array elements: " + arr + "<br>");
//filling all elements
arr.fill(0);
document.write("array elements: " + arr + "<br>");
//filling initial 2 elements with 100
arr.fill(10, 0, 2);
document.write("array elements: " + arr + "<br>");
//filling next 3 elements with 200
arr.fill(200, 2, 5);
document.write("array elements: " + arr + "<br>");
</script>
</body>
</html>
Output
array elements: 10,20,30,40,50
array elements: 0,0,0,0,0
array elements: 10,10,0,0,0
array elements: 10,10,200,200,200
JavaScript Array Object Methods »