Upper Triangular Matrix

object prog4 {
def main(args:Array[String]): Unit = {
val array = Array.ofDim[Int](100, 100)
println("Enter number of rows : ")
val r = scala.io.StdIn.readInt()
println("Enter number of columns : ")
val c = scala.io.StdIn.readInt()

println("Enter values of matrix : ")
for(i <- 0 until r) {
  for (j <- 0 until c) {
    array(i)(j) = scala.io.StdIn.readInt()
  }
}

println("The given matrix is : ")
for (i <- 0 until  r) {
  for (j <- 0 until c) {
    print(array(i)(j) + "\t")
  }
  println("\n")
}

var isUpper = 1
for (i <- 0 until r) {
  for (j <- 0 until c) {
    if(j < i && array(i)(j) != 0) {
      isUpper = 0
    }
  }
}

if(isUpper == 1)
  println("This is a Upper triangular matrix")
else
  println("This is not a upper triangular matrix")

}
}