01. Number Pyramid

import java.util.Scanner;

public class NumberPyramid {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int num = Integer.parseInt(scanner.nextLine()),
                counter = 1;

        for (int row = 1; row <= num; row++) {
            for (int col = 0; col < row; col++) {
                if (counter > num) {
                    break;
                }
                System.out.printf("%d ", counter);
                counter++;
            }
            if (counter > num) {
                break;
            }
            System.out.println();
        }
    }
}

ИЛИ:

import java.util.Scanner;

public class NumberPyramid {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int num = Integer.parseInt(scanner.nextLine()),
                counter = 1;

        for (int row = 1; row <= num || counter <= num; row++) {
            for (int col = 0; col < row && counter <= num; col++) {
                System.out.printf("%d ", counter++);
            }
            System.out.println();
        }
    }
}