Java program to print Rhombus and Hollow Rhombus star Using while loop

Java program to print Rhombus and Hollow Rhombus star pattern

In this article, we will discuss the concept of Java program to print Rhombus and Hollow Rhombus star pattern using while loop

In this post, we are going to learn how to use the while loop to write a program for print rhombus and hollow rhombus pattern using given symbol in Java language.

 

Display Rhombus  patterns Using while loop

Code to print Rhombus pattern using while loop

This program allows the user  to enter the number of rows and symbols then it will display  the rhombus  pattern using while loop in Java programming language

Program 1

//Code to print rhombus star pattern
import java.util.Scanner;
public class RhombusStar2{//class declaration
public static void main(String args[]){//main method

 Scanner scan=new Scanner(System.in); 
    //create a scanner object for input
    
System.out.println("Enter the number of rows: ");
//Ask input from the user
int rows=scan.nextInt();
//Store the row in the rows variable entered by user
System.out.println("Enter Symbol as you wish: ");
//Ask input from the user as symbol
char ch=scan.next().charAt(0);
//Store the symbol in the ch variable entered by user
System.out.print("\n");//Move to next line
int i=1;
while(i<=rows){//outer while loop 
//Condition of outer for loop is true 
//control moves to inner for to print space
int j=1;
   while(j<=rows-i){//inner while loop
   System.out.print(" ");//print space
    j++;
   }
   j=1;
   while(j<=rows){//inner while loop
   System.out.print(ch);//print symbol after space
   j++;
}
 System.out.print("\n");//move to next line
 i++;
}
}
}

When the above code is executed, it produces the following result

 

Code to print Hollow Rhombus pattern using while loop

This program allows the user  to enter the number of rows and symbols then it will display  the Hollow rhombus star  pattern using while loop in Java programming language

Program 2

//program to print Hollow rhombus star pattern
import java.util.Scanner;
public class HolloWRhombusStar2{//class declaration
public static void main(String args[]){//main method

 Scanner scan=new Scanner(System.in); 
    //create a scanner object for input
    
System.out.println("Enter the number of rows: ");
//Ask input from the user
int rows=scan.nextInt();
//Store the rows entered by user
System.out.println("Enter character as you wish: ");
//Ask input from the user as character
char ch=scan.next().charAt(0);
//Store the character entered by user
System.out.print("\n");
int i=1;
while(i<=rows){//outer for loop 
int j=1; 
   while(j<=rows-i){//inner for loop 
   System.out.print(" ");//print space
    j++;
   }
   j=1;
   while(j<=rows){//inner for loop
   if(i==1 || i==rows || j==1 || j==rows){
   System.out.print(ch);//print symbol after space
   }
   else{
         System.out.print(" ");//print space
   }
    j++;
}
 System.out.print("\n");//move to next line
  i++;
}
}
}

When the above code is executed, it produces the following result

 

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