Java program to print number star square pattern type 2

June 4, 2020

Print Number Star Square Pattern Type 2

In this java program we’re going to make number star pattern type-2 . Take input from user i.e number of lines required (N value).Take two loops one for each line (say ‘i’) and other for each digit in a particular line (say ‘j’). i starts from n and j starts from 1.Take a result variable (say ‘a’) and initialize it with (i*(i-1))+1, Since each line starts with 13,9,5,1.Here ‘i’ loop is used to access each line from N to 1 and ‘j’ loop is used to print values in each line. For example in line 2 the value of i=3 and for contents in second line (i.e 9*10*11*12) the value for j for digit 9 is j=1 and for digit 10 is j=2.Print ‘a’ value along with * and post decrement until the j loop reaches a value less than n.Print the final value ‘a’ of each line.Repeat the ‘i’ loop until it reaches 1.

Algorithm

Take input from user i.e number of lines required (N value).
Take two loops one for each line (say ‘i’) and other for each digit in a particular line (say ‘j’). i starts from n and j starts from 1.
Take a result variable (say ‘a’) and initialize it with (i*(i-1))+1, Since each line starts with 13,9,5,1.
Here ‘i’ loop is used to access each line from N to 1 and ‘j’ loop is used to print values in each line. For example in line 2 the value of i=3 and for contents in second line (i.e 9*10*11*12) the value for j for digit 9 is j=1 and for digit 10 is j=2.
Print ‘a’ value along with * and post decrement until the j loop reaches a value less than n.
Print the final value ‘a’ of each line.
Repeat the ‘i’ loop until it reaches 1.

Code in Java

import java.io.*;
class PrepInsta{
public static void main(String[] args)throws IOException{
    BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
    int n,i,j,a;
    System.out.print( "Enter N value:");
    n=Integer.parseInt(br.readLine());
    for(i=n;i>=1;i--){  
      a=(i*(i-1))+1;
      for(j=1;j<n;j++){
        System.out.print( (a++)+"*");
    }
    System.out.println( a++);
  }
 }
}
This code is contributed by Shubham Nigam (Prepinsta Placement Cell Student)