Reading line
We can read a single line string using the built-in method readLine from scala.io.StdIn:
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import scala.io.StdIn._
val input: String = readLine
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Reading a list of integers
When you need to read a list of integers, you have to read the entire line, split it and the convert
each element to an int:
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import scala.io.StdIn._
val listOfNumbers: List[Int] = readLine.split(" ").map(_.toInt)
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Reading first line with n, where n is number of rows made up of a single integer
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import scala.io.StdIn._
val listOfNumbers: List[Int] = List.fill(readInt)(readLine).map(_.toInt)
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Reading first line with n, where n is number of rows made up of integers
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import scala.io.StdIn._
val listOfListOfNumbers: List[List[Int]] = List.fill(readInt)(readLine.split(" ").map(_.toInt))
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Writing on STDOUT
When you need to write on stdout use: