# Spiral traversal of matrix in scala

Scala program for Spiral traversal of matrix. Here more information.

``````// Scala program
// Spiral form of 2d array
class SpiralView()
{
def spiral(data: Array[Array[Int]], startRow: Int,
startCol: Int, endRow: Int, endCol: Int, element1: Int): Unit = {
var i: Int = startCol;
var element: Int = element1;
// Left to right
while (i <= endCol && element > 0)
{
element -= 1;
print("  " + data(startRow)(i));
i += 1;
}
i = startRow + 1;
// Top to down
while (i <= endRow && element > 0)
{
element -= 1;
print("  " + data(i)(endCol));
i += 1;
}
i = endCol - 1;
// Bottom right to bottom-left
while (i >= startCol && element > 0)
{
element -= 1;
print("  " + data(endRow)(i));
i -= 1;
}
i = endRow - 1;
// Bottom left to top
while (i > startRow && element > 0)
{
element -= 1;
print("  " + data(i)(startRow));
i -= 1;
}
if (startRow + 1 <= endRow - 1 && element > 0)
{
// Recursive call
spiral(data, startRow + 1,
startCol + 1, endRow - 1, endCol - 1, element);
}
}
}
object Main
{
def main(args: Array[String]): Unit = {
var task: SpiralView = new SpiralView();
// 2d matrix
var matrix: Array[Array[Int]] = Array(
Array(1, 2, 3, 4, 5, 6),
Array(22, 23, 24, 25, 26, 7),
Array(21, 36, 37, 38, 27, 8),
Array(20, 35, 42, 39, 28, 9),
Array(19, 34, 41, 40, 29, 10),
Array(18, 33, 32, 31, 30, 11),
Array(17, 16, 15, 14, 13, 12)
);
var row: Int = matrix.length;
var col: Int = matrix(0).length;
// Get the number of element
var element: Int = row * col;
task.spiral(matrix, 0, 0, row - 1, col - 1, element);
}
}``````

Output

``  1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38  39  40  41  42``

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