java program for printing binary right angled traingle

/*
1
1 0 
1 0 1
1 0 1 0
1 0 1 0 1
*/

import java.io.*;
import java.util.*;

public class Binary_triangle {
public static void main(String[] args) {
       
        int num,row,coloumn;
        System.out.println("Enter the size of row");
        Scanner sc=new Scanner(System.in);
        num=sc.nextInt();
        for(row=1;row<num;row++)
        {
            for(coloumn=1;coloumn<=row;coloumn++)
                System.out.print(coloumn % 2+"\t");
                System.out.print("\n");
       
        }       
    }
   
}