Write a java program to print the given Square Pattern on taking an integer as input from commandline. Examples:
Input : 3
Output :1 2 3.
7 8 9
4 5 6
Input :4
Output :1 2 3 4
9 10 11 12
13 14 15 16
5 6 7 8
Java
// Java program to print a square pattern with command // line one argument import java.util.*; import java.lang.*; public class SquarePattern { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter a number"); int number = sc.nextInt(); int arr[][] = PrintSquarePattern(number); // int num = 3; int k = 0, m = number - 1, n = number; int l = 0; if (number % 2 == 0) m = number - 1; else m = number; for (int i = 0; i < n / 2; i++) { for (int j = 0; j < n; j++) { System.out.format("%3d", arr[k][j]); } System.out.println(""); l = l + 2; k = l; // System.out.println(""); } k = number - 1; for (int i = n / 2; i < n; i++) { for (int j = 0; j < n; j++) { System.out.format("%3d", arr[k][j]); } m = m - 2; k = m; System.out.println(""); } } public static int[][] PrintSquarePattern(int n) { int arr[][] = new int[n][n]; int k = 1; for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) { arr[i][j] = k; k++; } } return arr; } } |
Input :
5
Output :
Enter a number 1 2 3 4 5 11 12 13 14 15 21 22 23 24 25 16 17 18 19 20 6 7 8 9 10
Time complexity: O(n^2) for given input n
Auxiliary Space: O(1)
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