How is Val different from var in Scala?

0 votes
Can anyone explain how is Val different from var in Scala?
Jul 24 in Apache Spark by Ujwal
21 views

1 answer to this question.

0 votes

Hey,

In this language, val is a value and var is a variable. These are two different keywords for declaring immutable and mutable entities respectively. This means that you can always reassign a var, but trying to do that to a val makes the compiler throw an error. 

scala> val c=7

c: Int = 7

scala> c=8

<console>:19: error: reassignment to val

c=8



l

a> var c=7

c: Int =


l

a> c=8

c: Int = 8
answered Jul 24 by Gitika
• 25,300 points

Related Questions In Apache Spark

0 votes
1 answer

How is RDD in Spark different from Distributed Storage Management? Can anyone help me with this ?

Some of the key differences between an RDD and ...READ MORE

answered Jul 26, 2018 in Apache Spark by zombie
• 3,690 points
132 views
0 votes
1 answer

How is Apache Spark different from the Hadoop approach?

In Hadoop MapReduce the input data is ...READ MORE

answered May 7, 2018 in Apache Spark by BD Master
73 views
0 votes
0 answers

How to create RDD from existing RDD in scala?

Can anyone suggest how to create RDD ...READ MORE

Jul 3 in Apache Spark by Nihal
9 views
0 votes
1 answer

How to create RDD from an external file source in scala?

Hi, To create an RDD from external file ...READ MORE

answered Jul 3 in Apache Spark by Gitika
• 25,300 points
33 views
0 votes
1 answer
0 votes
1 answer

Hadoop Mapreduce word count Program

Firstly you need to understand the concept ...READ MORE

answered Mar 16, 2018 in Data Analytics by nitinrawat895
• 10,510 points
2,408 views
0 votes
1 answer

hadoop.mapred vs hadoop.mapreduce?

org.apache.hadoop.mapred is the Old API  org.apache.hadoop.mapreduce is the ...READ MORE

answered Mar 16, 2018 in Data Analytics by nitinrawat895
• 10,510 points
246 views
0 votes
10 answers

hadoop fs -put command?

put syntax: put <localSrc> <dest> copy syntax: copyFr ...READ MORE

answered Dec 7, 2018 in Big Data Hadoop by Aditya
12,237 views
0 votes
1 answer

How SparkSQL is different from HQL and SQL?

Hi, SparkSQL is a special component on the ...READ MORE

answered Jul 3 in Apache Spark by Gitika
• 25,300 points
34 views
0 votes
1 answer

How to create RDD from parallelized collection in scala?

Hi, You can check this example in your ...READ MORE

answered Jul 3 in Apache Spark by Gitika
• 25,300 points
39 views