JavaScript Array forEach() Method

by Online Tutorials Library July 22, 2022

JavaScript Array forEach() method

The JavaScript array forEach() method is used to invoke the specified function once for each array element.

Syntax

The forEach() method is represented by the following syntax:

Parameter

callback – It represents the function that test the condition.

currentvalue – The current element of array.

index – It is optional. The index of current element.

arr – It is optional. The array on which forEach() operated.

thisArg – It is optional. The value to use as this while executing callback.

Return

undefined

JavaScript Array forEach() method example

Let’s see some examples of forEach() method.

Example 1

Here, we will print the array elements using forEach().

  <script>  var arr = [“C”, “C++”, “Python”];    arr.forEach(function(fetch) {    document.writeln(fetch);  });  </script>  

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Output:

C C++ Python

Example 2

Here, we will print the Fibonacci series with the help of forEach() method.

  <script>  var sum = 0;  var arr = [10,18,12,20];    arr.forEach(function myFunction(element) {      sum= sum+element;    document.writeln(sum);  });  </script>  

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Output:

10 28 40 60

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