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  1. import java.util.Scanner;
  2.  
  3. class PatternGenerator {
  4.     public static void main(String[] args) {
  5.         int compare = 0;
  6.         int number = 0;
  7.         Scanner input = new Scanner(System.in);
  8.  
  9.         do {
  10.             System.out.println("Number must be between 1 and 6");
  11.             number = input.nextInt();
  12.  
  13.             while (number < 1 || number > 6) {
  14.                 System.out.println("Error: number must be between 1 and 6");
  15.                 number = input.nextInt();
  16.             }
  17.  
  18.             for (int i = 1; i <= number; ++i) {
  19.                 for (int e = 1; e <= number; ++e) {
  20.                     compare = compare + e;
  21.                     if (compare <= 2) {
  22.                         System.out.print("x ");
  23.                     } else {
  24.                         System.out.print(compare + " ");
  25.                     }
  26.                 }
  27.                 ++compare;
  28.                 System.out.println();
  29.             }
  30.         } while (number < 1 || number > 6);
  31.     }
  32. }
Success #stdin #stdout 0.13s 58980KB
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stdin
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6
stdout
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Number must be between 1 and 6
x 3 6 10 15 21 
23 25 28 32 37 43 
45 47 50 54 59 65 
67 69 72 76 81 87 
89 91 94 98 103 109 
111 113 116 120 125 131
https://ideone.com/JuAMEl
language:
Java (12.0.1)
created:
155 days ago
visibility:
secret

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