Java code to Generate Rhombus patterns using do-while loop

Java code to Generate Rhombus patterns using do-while loop

In this article, we will discuss the concept of Java code to Generate Rhombus patterns using do-while loop

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

Display Rhombus  patterns Using do-while loop

Code to print Rhombus  pattern using do-while loop

Program 1

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

//program to display rhombus star pattern using do while
import java.util.Scanner;
public class RhombusStar3{//class declaration
public static void main(String args[]){//main method

 Scanner scan=new Scanner(System.in); 
    //create a scanner object for user input
    
System.out.println("Enter the number of rows: ");
//Take input from the user
int rows=scan.nextInt();
//Store the rows 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");
int i=1;
do{//outer do-while loop 
int j=1;
   do{//inner do-while loop
   System.out.print(" ");//print space
    j++;
   }while(j<=rows-i);
   j=1;
   do{//inner do-while loop
   System.out.print(ch);//print symbol after space
   j++;
}while(j<=rows);
 System.out.print("\n");//move to next line
 i++;
}while(i<rows);
}
}

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

 

Code to print Hollow Rhombus  pattern using do-while loop

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

Program 2

//program to display Hollow rhombus pattern
import java.util.Scanner;
public class HolloWRhombusStarpat{//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: ");
//Takes input from the user
int rows=scan.nextInt();
//Store the number of rows in rows variable 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 in the ch variable entered by user
System.out.print("\n");
int i=1;
do{//outer for loop 
int j=0; 
  do{//inner for loop 
   System.out.print(" ");//print space
    j++;
   } while(j<=rows-i);
   j=1;
   do{//inner for loop
   if(i==1 || i==rows || j==1 || j==rows){
       //Check the condition, when it is true
       //When it is false, The control moves to else part
   System.out.print(ch);//print symbol after space
   }
   else{
         System.out.print(" ");//print space
   }
    j++;
}while(j<=rows);
 System.out.print("\n");//move to next line
  ++i;
}while(i<=rows);
}
}

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

 

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