Question

(Java) the question is comments under

public static void main(String[] args) {

   for(int i =1; i<=5; i++)
   {
       for(int j=1; j<=i; j++)
   {
           System.out.print("* ");
       }
           System.out.println(""); //
          
   }
  
   for(int i=1; i<=4;i++)
   {
       for(int j=4; j>=i; j--) // j>=i means each row has * of columns, so first row ****, second row ***, and so on
           // But, j>=i The thing confusing about this is, when it is 3rd row j is 2 columns, 4th row, 1 column or 1 asterisk. so j isn't greater than i, but why do we use j >= i? I do get the asterisk decrement by 1 so we use j--.
By the way this coding will give half diamond shape.
           {
               System.out.print("* ");
           }
               System.out.println("");
   }

Answer 1

Here is code:

import java.util.*;

class Test {

public static void main(String[] args) {

for (int i = 1; i <= 5; i++) {

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

System.out.print("* ");

}

System.out.println(""); //

}

for (int i = 4; i >= 1; i--) {

for (int j = 1; j <= i; j++)

{

System.out.print("* ");

}

System.out.println("");

}

}

}

/*

I have made changes in the code so that is quiet easy to understand..

i then second half of the loop..

i loops from 4 to 1

when i = 4, j loops from 1 to 4 times so it print 4 *'s

when i = 3, j loops from 1 to 3 times so it print 3 *'s

when i = 2, j loops from 1 to 2 times so it print 2 *'s

when i = 1, j loops from 1 to 1 times so it print 1 *'s

when i = 0 exit the loop

*/