Pattern Questions ##4

QUESTION1:

16.           1
            1   1
          1   2   1
        1   3   3   1
      1   4   6   4   1

SOLUTION:

public class Hello{
    public static void main(String[] args) {
        Patterns(4);
    }

public static void Patterns(int n){
    //run the outer loop same as the number of rows
  for(int i = 1; i <= n; i++){

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

    int c = 1;

    for(int k = 1; k <= i; k++){
      System.out.print(c + " ");
      c = c*(i-k)/k;
    }
    System.out.println();
  }
   
}

}

QUESTION2:

17.      1
        212
       32123
      4321234
       32123
        212
         1

SOLUTION:

public class Hello{
    public static void main(String[] args) {
        Patterns(4);
    }

public static void Patterns(int n){
    //run the outer loop same as the number of rows
//As we want to print numbers, we will start the loop from 1 and 
//not from 0
   for(int i = 1; i <= 2*n; i++){

    int c = i <= n ? i : 2*n-i;

    for(int j = 1; j <= n-c; j++){
      System.out.print(" ");
    }
    for(int k = c; k >= 1; k--){
      System.out.print(k);
    }
    for(int l = 2; l <= c; l++){
      System.out.print(l);
    }

    System.out.println();
  }
   
}
}

QUESTION3:

18.   **********
      ****  ****
      ***    ***
      **      **
      *        *
      *        *
      **      **
      ***    ***
      ****  ****
      **********

SOLUTION:

public class Hello{
    public static void main(String[] args) {
    Pattern(7);
    }
   
static void Pattern(int n){
//run the outer loop same time as the number of rows
  for(int i = 1; i <= 2*n; i++){

    int c = i <= n ? n-i : i-n-1;
    int s = i <= n ? 2*(i-1) : 2*(2*n-i);

//count the number of column occupied and run the inner loop that much time
    for(int j = 1; j <= 2*n; j++){
      if(j <= c+1){
        System.out.print("*");
      }else if(j <= c+1+s){
        System.out.print(" ");
      }else{
        System.out.print("*");
      }
    }
    System.out.println();
  }
}
    }

QUESTION4:

19.    *        *
       **      **
       ***    ***
       ****  ****
       **********
       ****  ****
       ***    ***
       **      **
       *        *

SOLUTION:

public class Hello{
    public static void main(String[] args) {
    Pattern(5);
    }
   
static void Pattern(int n){
//run the outer loop same as the number of rows
  for(int i = 1; i < 2*n; i++){

    int c = i <= n ? i : 2*n-i;
    int s = 2*(n-c);

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

QUESTION5:

20.    ****
       *  *
       *  *
       *  *
       ****

SOLUTION:

public class Hello{
    public static void main(String[] args) {
    Pattern(5);
    }
   
static void Pattern(int n){
//run the outer loop same as the number of rows
  for(int i = 1; i <= n; i++){

    for(int j = 1; j < n; j++){
      if(i == 1 || i == n || j == 1 || j == n-1){
        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.