Finding the sum of all even numbers in an RDD of integers

Let's first create an RDD of integers as follows:

scala>valintRDD = sc.parallelize(Array(1,4,5,6,7,10,15))
intRDD: org.apache.spark.rdd.RDD[Int] = ParallelCollectionRDD[0] at parallelize at <console>:24

The next step is to filter all the even elements in this RDD. So, we will execute a filter operation on the RDD, as follows:

scala>valevenNumbersRDD=intRDD.filter(i => (i%2==0))
evenNumbersRDD: org.apache.spark.rdd.RDD[Int] = MapPartitionsRDD[3] at filter at <console>:26

The preceding operation will fetch those elements for which 2 is a factor, that is, even elements .

Now, we will sum all the elements of this RDD as follows:

scala>val sum =evenNumbersRDD.sum
sum: Double = 20.0
scala> sum
res5: Double = 20.0

It is shown in the following screenshot: