What is Streams in Scala

Question

Can anyone explain what streams in Scala?

Answer 1

Hi,

A stream is a lazy list as it evaluates elements only when it needs to. This lazy computation enhances program performance.

scala> val stream=177#::199#::69#::Stream.empty

stream: scala.collection.immutable.Stream[Int] = Stream(177, ?)

Since we don’t need the second element yet, Scala doesn’t evaluate it.

scala> val stream1=(1 to 7).toStream

stream1: scala.collection.immutable.Stream[Int] = Stream(1, ?)

scala> stream.head

Result:

res22: Int = 177

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