/*

* PROGRAM : To find the upper triangular matrix

* FILE : UpperTriangularMatrix.java

* CREATED BY : Santosh Hembram

* DATE : 12-10-20

*/

import java.util.*;

class UpperTriangularMatrix {

public static void upperTriangular(int mat[][],int r,int c){

System.out.println("-------- Displaying the upper triangular matrix ---------");

for (int i=0; i<r; i++) {

for (int j=0; j<c; j++) {

if (i<=j) {

System.out.print(mat[i][j]+" ");

}

else {

System.out.print("0"+" ");

}

}

System.out.println();

}

}

public static void main(String args[]) {

Scanner sc = new Scanner(System.in);

System.out.print("Enter the row size: ");

int r = sc.nextInt();

System.out.print("Enter the coloumn size: ");

int c = sc.nextInt();

while (r!=c) {

System.out.println("WARNING!!!");

System.out.println("The row and coloumn size must be equal.");

System.out.print("re-Enter the coloumn size : ");

c = sc.nextInt();

}

int mat[][] = new int[r][c];

System.out.println("---------- Enter the elements of the matrix --------------");

for(int i=0; i<r; i++) {

for (int j=0; j<c; j++) {

System.out.print("Enter the elements for row "+i+" coloumn "+j+": ");

mat[i][j] = sc.nextInt();

}

}

System.out.println("---------- Displaying the matrix --------------");

for(int i=0; i<r; i++) {

for (int j=0; j<c; j++) {

System.out.print(mat[i][j]+" ");

}

System.out.println();

}

upperTriangular(mat,r,c);

}

}