How is Val different from var in Scala

Question

Can anyone explain how is Val different from var in Scala?

Answer 1

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