write a program to check if matrix is upper triangular or Not

object UpperTrang {
def main(args: Array[String]): Unit =
{

var A=Array.ofDim[Int](100,100)
println("Enter no. of rows :: ")
var m= scala.io.StdIn.readInt()
    println("\nEnter no. of cols :: ")
var n = scala.io.StdIn.readInt()
    printf("\nEnter values to the matrix :: \n")
    for (i <- 0 to m-1)
    {
        for (j <- 0 to n-1)
        {
          A(i)(j)=scala.io.StdIn.readInt()
          println(A(i)(j)+" ");
             
        }
    }

println("\nThe given matrix is ::");

    for (i <- 0 to m-1)
    {
        for (j <- 0 to n-1)
        {
            print(A(i)(j)+"\t");
        }
        print("\n\n");
    }

var isUpper = 1;
for(row<-0 to m-1)
{
for(col<-0 to n-1)
{
if(col<row && A(row)(col)!=0)
{
isUpper = 0;
}
}
}
if(isUpper==1)
{
println("\nThis is a Upper triangular matrix")
for(row<-0 to m-1)
{
for(col<-0 to n-1)
{
if(A(row)(col)!= 0)
{
print(A(row)(col)+"\t");
}
else
{
print("\t");
}

        }
    print("\n\n");
    }
}
else
{
    print("\nThis is Not a Upper triangular matrix.");
}

}
}