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Array shift() method with example in JavaScript
JavaScript shift() method: Here, we are going to learn about the shift() method of array in JavaScript.
Submitted by IncludeHelp, on February 28, 2019
JavaScript shift() method
shift() method is used to remove the first element of an array and returns the deleted element.
It changes the array length.
Syntax:
array_name.shift();
Parameters: None
Return value: It returns a type of value that array contains, it actual returns deleted the element.
Example:
Input:
var arr1 = [10, 20, 30, 40, 50];
Function call:
arr1.shift();
Output:
20, 30, 40, 50
JavaScript Code to demonstrate example of Array.shift() method
<html>
<head>
<title>JavaScipt Example</title>
</head>
<body>
<script>
var arr1 = [10, 20, 30, 40, 50];
var arr2 = ["Amit", "Ankur", "Akash"];
//printing arrays before the deleting elements
document.write("arr1: " + arr1 + "<br>");
document.write("arr1 length: " + arr1.length + "<br>");
document.write("arr2: " + arr2 + "<br>");
document.write("arr2 length: " + arr2.length + "<br>");
//removing element
arr1.shift();
arr1.shift();
arr2.shift();
document.write("<br>After removing...<br><br>");
document.write("arr1: " + arr1 + "<br>");
document.write("arr1 length: " + arr1.length + "<br>");
document.write("arr2: " + arr2 + "<br>");
document.write("arr2 length: " + arr2.length + "<br>");
</script>
</body>
</html>
Output
arr1: 10,20,30,40,50
arr1 length: 5
arr2: Amit,Ankur,Akash
arr2 length: 3
After removing...
arr1: 30,40,50
arr1 length: 3
arr2: Ankur,Akash
arr2 length: 2
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