Example: Floyd Triangle Pattern Program in Java using For loop

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// Floyd Triangle Pattern Program in Java using For loop
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        int r, i, j, n = 1;
        // r - denotes the number of rows

        System.out.println("-----Kindly enter the number of rows to print Floyd's triangle number pattern-----");
        r = in.nextInt();

        System.out.println("\n-----This is Floyd's triangle number pattern-----\n");
        for (i = 1; i <= r; i++) {
            System.out.print("\t");
            for (j = 1; j <= i; ++j) {
                System.out.print(n + "\t");
                ++n;
            }
            System.out.print("\n");
        }
    }
}