Java Programs to print pattern 12345 22345 33345 44445 55555

import java.util.Scanner;

public class Pattern {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        System.out.print("Enter n: ");

        int n = scanner.nextInt();

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

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

                if (j <= i) {

                    System.out.print(i + " ");

                } else {

                    System.out.print(j + " ");

                }

            }

            System.out.println();

        }

    }

Output:

12345

22345

33345

44445

55555

Java Programs to print pattern 1 10 101 1010 10101

Java Programs to print pattern 1 10 101 1010 10101


The outer loop counter i ranges from 1 to n. i is used to keep track of line number. Line i contains i numbers. So, the inner loop counter j ranges from 1 to i. If j is odd, we print 1, else we print 0.

import java.util.Scanner;

public class Pattern {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter n: ");
        int n = scanner.nextInt();
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= i; j++) {
                if (j % 2 == 1) {
                    System.out.print("1 ");
                } else {
                    System.out.print("0 ");
                }
            }
            System.out.println();
        }
    }

}

Enter n: 5
1
1 0
1 0 1
1 0 1 0
1 0 1 0 1