Problem Statement

Show a nested loop which searches a two-dimensional array filled with random numbers uniformly distributed over

[ 1 , … , 20 ]

{\displaystyle [1,\ldots ,20]}

. The loops iterate rows and columns of the array printing the elements until the value

20

{\displaystyle 20}

is met. Specifically, this task also shows how to break out of nested loops.

Let's start with the solution:

import scala.util.control.Breaks._
val a=Array.fill(5,4)(scala.util.Random.nextInt(21))
println(a map (_.mkString("[", ", ", "]")) mkString "\n")
breakable {
  for(row <- a; x <- row){
    println(x)
    if (x==20) break
  }
}