Pattern Question ##5

QUESTION1:

21.    1
       2  3
       4  5  6
       7  8  9  10
       11 12 13 14 15

SOLUTION:

public class Hello{
    public static void main(String[] args) {
    Pattern(5);
    }
   
static void Pattern(int n){
  int count = 1;

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

    for(int j = 1; j <= i; j++){
     System.out.print(count + " ");
     count++;
    }
    System.out.println();
  }
}
}

QUESTION2:

22.    1
       0 1
       1 0 1
       0 1 0 1
       1 0 1 0 1

SOLUTION:

public class Hello{
    public static void main(String[] args) {
    Pattern(5);
    }
   
static void Pattern(int n){
  boolean temp = true;

  for(int i = 1; i <= n; i++){
    
    temp = i%2 == 0 ? false : true;
   
    for(int j = 1; j <= i; j++){
      if(temp){
        System.out.print(1 + " ");
        temp = false;
      }else{
        System.out.print(0 + " ");
        temp = true;
      }
    }
    System.out.println();
  }
}
}

QUESTION3:

24.    *        *
       **      **
       * *    * *
       *  *  *  *
       *   **   *
       *   **   *
       *  *  *  *
       * *    * *
       **      **
       *        *

SOLUTION:

public class Patterns {
    public static void main(String[] args) {
        Pattern(5);
    }
    static void Pattern(int n){
        for(int i = 1; i <= 2*n; i++){

            int c1 = i <= n ? i : 2*n-i+1;
            int c2 = i <= n ? 2*n-i+1 : 2*n-c1+1;

            for(int j = 1; j <= 2*n; j++){
                if(j == 1 || j == c1 || j == 2*n || j == c2){
                    System.out.print("*");
                }else{
                    System.out.print(" ");
                }
            }
            System.out.println();
        }
    }

}

QUESTION4:

25.       *****
         *   *
        *   *
       *   *
      *****

SOLUTION:

public class Patterns {
    public static void main(String[] args) {
        Pattern(5);
    }
    static void Pattern(int n){
        for(int i = 1; i <= n; i++){

            for(int j = 1; j <= n-i; j++){
                System.out.print(" ");
            }
            for(int k = 1; k <= n; k++){
                if(i == 1 || i == n || k == 1 || k == n){
                    System.out.print("*");
                }else{
                    System.out.print(" ");
                }
            }
            System.out.println();
        }
    }

}

Thank you for reading. If you have any queries then, please let me know in the comment section. I will surely be responsive toward it.