Write a Scala program to find the maximum occurring character in a string

object Scala_String {
  def MaxOccuringChar(str1: String): Char = {
    val N = 256;
    val ctr = new Array[Int](N);
    val l = str1.length();
    for (i <- 0 to l - 1)
      ctr(str1.charAt(i)) = ctr(str1.charAt(i)) + 1;
    var max = -1;
    var result = ' ';
    for (i <- 0 to l - 1) {
      if (max < ctr(str1.charAt(i))) {
        max = ctr((str1.charAt(i)))
        result = str1.charAt(i)
      }
    }
    result
  }
  def main(args: Array[String]): Unit = {
    val str1 = "test string"
    println("The given string is: " + str1)
    println(
      "Maximum occurring character of the said string is: " + MaxOccuringChar(str1)
    );
    val str2 = "Scala"
    println("The given string is: " + str2)
    println(
      "Maximum occurring character of the said string is: " + MaxOccuringChar(str2)
    );
  }
}