Scala code for Pascal's Triangle.

PascalsTriangle.scala

def nextRow(row: List[Int]): List[Int] = (row, (0 :: row)).zipped.map(_ + _)

/* Generating 5 rows of Pascal's triangle. */
var pascal = List[List[Int]]( List(1,0,0,0,0) )
for (i <- 1 to 4) {
  pascal = nextRow(pascal.head) :: pascal
}
pascal = pascal.reverse

for (row <- pascal) { 
  for (element <- row) {
    print(element + " ")
  }
  println
}