How to unpack array elements into separate variables using JavaScript ?

Given an array and the task is to unpack the value of array into separate variables by using preferred method using javascript.

Approach:

  • Store the elements of an array into array variable.
  • Now use ES6 script to declare a variable and unpack the value of array into separate variables.

Example 1: This example declare a variable using let keyword to unpack the array elements into separate variables.



filter_none

edit
close

play_arrow

link
brightness_4
code

<!DOCTYPE HTML> 
<html
  
<head
    <title
        How to unpack array elements into separate
        variables using JavaScript ?
    </title>
</head
  
<body style = "text-align:center;"
      
    <h1 style = "color:green;"
        GeeksForGeeks 
    </h1>
      
    <p id = "GFG_UP" style
        "font-size: 19px; font-weight: bold;">
    </p>
      
    <button onclick = "GFG_Fun()">
        click here
    </button>
      
    <p id = "GFG_DOWN" style
        "color: green; font-size: 24px; font-weight: bold;">
    </p>
      
    <script>
        var el_up = document.getElementById("GFG_UP");
        var el_down = document.getElementById("GFG_DOWN");
        var ar = [1, 2, 3, 4];
        el_up.innerHTML = "Click on button to unpack the "
                + "values of array.<br> [" +ar + "]";
          
        function GFG_Fun() {
            let [a, b, c, d] = ar;
            el_down.innerHTML = "Unpacked Values - " + a +
                    ", " + b + ", " + c + ", " + d;
        }
    </script
</body
  
</html>

chevron_right


Output:

  • Before clicking on the button:
  • After clicking on the button:

Example 2: This example declare a variable using var keyword to unpack the array elements into separate variables.

filter_none

edit
close

play_arrow

link
brightness_4
code

<!DOCTYPE HTML> 
<html
  
<head
    <title
        How to unpack array elements into separate
        variables using JavaScript ?
    </title>
</head
  
<body style = "text-align:center;"
      
    <h1 style = "color:green;"
        GeeksForGeeks 
    </h1>
      
    <p id = "GFG_UP" style
        "font-size: 19px; font-weight: bold;">
    </p>
      
    <button onclick = "GFG_Fun()">
        click here
    </button>
      
    <p id = "GFG_DOWN" style
        "color: green; font-size: 24px; font-weight: bold;">
    </p>
      
    <script>
        var el_up = document.getElementById("GFG_UP");
        var el_down = document.getElementById("GFG_DOWN");
        var ar = [1, 2, 3, 4];
          
        el_up.innerHTML = "Click on button to unpack the"
                + " values of array.<br> [" +ar + "]";
          
        function GFG_Fun() {
            var [a, b, c, d] = ar;
            el_down.innerHTML = "Unpacked Values - " + a +
                    ", " + b + ", " + c + ", " + d;
        }
    </script
</body>
  
</html>

chevron_right


Output:

  • Before clicking on the button:
  • After clicking on the button:


My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.