https://community.cloudera.com/t5/Support-Questions/Explain-foreach-operation-in-apache-spark/m-p/224228#M186092 <P>foreach() operation is an action.</P><P>&gt; It do not return any value.<BR />&gt; It executes input function on each element of an RDD.</P><P>From :<BR /><A href="http://data-flair.training/blogs/rdd-transformations-actions-apis-apache-spark/#39_Foreach">http://data-flair.training/blogs/rdd-transformations-actions-apis-apache-spark/#39_Foreach</A></P><P>It executes the function on each item in <STRONG><A href="http://data-flair.training/forums/topic/explain-foreach-operation">RDD</A></STRONG>. It is good for writing database or publishing to web services. It executes parameter less function for each data items.</P><P><STRONG>Example:</STRONG></P><PRE><CODE>val mydata = Array(1,2,3,4,5,6,7,8,9,10) val rdd1 = sc.parallelize(mydata) rdd1.foreach{x=&gt;println(x)} OR rdd1.foreach{println}</CODE></PRE><P><STRONG><BR />Output:</STRONG><BR />1<BR />2<BR />3<BR />4<BR />5<BR />6<BR />7<BR />8<BR />9<BR />10</P> Mon, 21 Aug 2017 12:54:02 GMT chan_di_sharma4 2017-08-21T12:54:02Z