JavaScript Array entries() Method

Difficulty Level : Easy
Last Updated : 23 Jun, 2020

Below is the example of the Array entries() method.

Example:

<!DOCTYPE html> 
<html> 
    <body style="text-align: center;"> 
        <h1 style="color: green;"> 
          GeeksforGeeks 
        </h1> 
        <b> 
          JavaScript | Array entries() Method 
        </b> 
        <p id="geeks"></p> 
  
        <script> 
            var lnaguages = ["HTML", "CSS",  
                             "JavaScript", "ReactJS"]; 
            var g = lnaguages.entries(); 
  
            for (x of g) { 
                document.getElementById("geeks") 
                  .innerHTML += x + "<br>"; 
            } 
        </script> 
    </body> 
</html> 

Output:

The arr.entries() method is used to get a new Array that contains the key and value pairs for each index of an array.

Syntax:

array.entries()

Parameters: This method does not accept any parameter.

Return value: It returns an array of indexes and values of the given array on which arr.entries() method is going to work.

More example codes for the above method are as follows:

Program 1:

<script> 
    var arr = ["HTML", "CSS", "JS",  
               "Bootstrap", "PHP"]; 
    var seqn = arr.entries(); 
    document.write("Applying the Array entries method:"
                   + "<br>"); 
  
    for (var x of seqn) { 
        document.write(x + "</br>"); 
    } 
</script> 

Output:

Applying the Array entries method:
0,HTML
1,CSS
2,JS
3,Bootstrap
4,PHP

Program 2:

<script> 
    const x = ["Geeks", "for", "Geeks"]; 
  
    for (const [index, element] of x.entries())  
      document.write(index, element); 
</script> 

Output:

0Geeks1for2Geeks

Supported Browsers: The browsers supported by JavaScript Array entries() method are listed below:

Google Chrome 38.0
Microsoft Edge 12.0
Mozilla Firefox 28.0
Safari 8.0
Opera 25.0

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JavaScript Array entries() Method

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