Right Triangle Number Using Loop

 Ans: 

package HelloWorld;

import java.util.Scanner;

public class LearningJava {

// A , E , I , O , U

public static void main (String[] args) {

Scanner scan = new Scanner(System.in);

int n = scan.nextInt();

for(int i =1;i<=n;i++) {

for(int j=1;j<=i;j++) {

System.out.print(j);

}

System.out.println();

}

}

}

Console//

1

12

123

1234