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Scala Stream

Stream is a lazy list. It evaluates elements only when they are required. This is a feature of scala. Scala supports lazy computation. It increases performance of your program.


Scala Stream Example

In the following program, we have created a stream.

Output:

Stream(100, ?)

In the output, you can see that second element is not evaluated. Here, a question mark is displayed in place of element. Scala does not evaluate list until it is required.


Scala Stream Example: Applying Predefined Methods

In the following example, we have used some predefined methods like toStream, which is used to iterate stream elements.

Output:

Stream(100, ?)
Stream(1, ?)
1
Stream(1, ?)
Stream(200, ?)
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