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Floyd Triangle in Java

Print Floyd’s triangle pattern using consecutive numbers.

BeginnerModule 3: Loop ProgramsExample 17 of 25

floyd-triangle.java

1public class Main {
2    public static void main(String[] args) {
3        int n = 5;
4        int num = 1;
5        for (int i = 1; i <= n; i++) {
6            for (int j = 1; j <= i; j++) {
7                System.out.print(num++ + " ");
8            }
9            System.out.println();
10        }
11    }
12}

Output

1 
2 3 
4 5 6 
7 8 9 10 
11 12 13 14 15

What's going on

We maintain a running number that increments each time we print in the nested loop.

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