Java - creating a triangle with numbers using nested for-loops [closed]

Answer 1

try

    for (int i = 1; i <= 6; i++) {
        for (int j = 6; j > i; j--) {
            System.out.print("  ");
        }
        for (int j = i; j > 1; j--) {
            System.out.print(j + " ");
        }
        for (int j = 1; j <= i; j++) {
            System.out.print(j + " ");
        }
        System.out.println();
    }

output

          1 
        2 1 2 
      3 2 1 2 3 
    4 3 2 1 2 3 4 
  5 4 3 2 1 2 3 4 5 
6 5 4 3 2 1 2 3 4 5 6 

Answer 2

Print 2*(6-i) spaces, then print numbers from j = i descending while j > 0, then print numbers from j = 2 ascending while j <= i.