How to declare Scala array

Question

Can anyone explain how to declare Scala array?

Answer 1

Hi,

We can declare Scala arrays in two ways:

• Adding Elements Later: We can create an array in Scala with default initial elements according to data type, and then fill in values later.

scala> var a:Array[Int]=new Array[Int](3)

a: Array[Int] = Array(0, 0, 0)

scala> a(4/2)=3

scala> a

res10: Array[Int] = Array(0, 0, 3)

• Define Scala Array with Values: We can also define a Scala array specifying its values in place.

​scala> var a=Array(1,2,3)

​a: Array[Int] = Array(1, 2, 3

)​​scala> a(4)

java.lang.ArrayIndexOutOfBoundsException: 4

scala> a(0)

res12: Int = 1

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