On April 24, 2021
By Karmehavannan
0 Comment
Categories: for loop, star pattern
Tags: Java language, Java pattern, Java programs, Pattern

Parallelogram and Hollow Parallelogram star pattern in Java using for loop

Parallelogram and Hollow parallelogram star pattern in Java using for loop

In this article, we will discuss the concept of Parallelogram and its Hollow star pattern using for loop in Java programming language

In this post, we are going to learn how to write a program to print parallelogram and Hollow patterns using for loop in Java language.

Display parallelogram star patterns Using for loop

Code to print Parallelogram star pattern

Parallelogram and Hollow Parallelogram star pattern in Java using for loop — Parallelogram star pattern in Java

Program 1

This program allows the user to enter the number of rows , columns and any symbol then it will display the parallelogram pattern using for loop in Java programming language

//parallelogram star pattern program using for loop in Java language
import java.util.Scanner;
public class parallelogramStar1{//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 to rows
int rows=scan.nextInt();
//Store the input value in variable rows entered by user

System.out.println("Enter the number of columns: ");
//Ask input from the user to columns
int columns=scan.nextInt();
//Store the input value in variable columnss 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 input symbol in variable ch entered by user

System.out.print("\n");//move to next line
for(int i=1; i<=rows; i++){//outer for loop 
//Condition of outer for loop is true 
//control moves to inner for to print space
   for(int j=1; j<=rows-i; j++){//inner for loop
   System.out.print(" ");//print space
   }
   for(int j=1; j<=columns; j++){//inner for loop
   System.out.print(ch);//print symbol after space
}
 System.out.print("\n");//move to next line
}
}
}

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

Parallelogram star pattern in Java using for loop — Parallelogram star pattern

Code to print Hollow Parallelogram star pattern

Program 2

This program allows the user to enter the number of rows , columns and symbols then it will display the Hollow parallelogram pattern using for loop in Java programming language

//program to print Hollow parallelogram star pattern
import java.util.Scanner;
public class HollowparallelogramStar1{//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 to rows
int rows=scan.nextInt();
//Store the row in the rows variable entered by user

System.out.println("Enter the number of columns: ");
//Ask input from the user to columns
int columns=scan.nextInt();
//Store the column in the columns 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");
for(int i=1; i<=rows; i++){//outer for loop 
   for(int j=1; j<=rows-i; j++){//inner for loop
   System.out.print(" ");//print space
   }
   for(int j=1; j<=columns; j++){//inner for loop
   if(i==1 || i==rows || j==1 || j==columns){
   System.out.print(ch);//print symbol after space
   }
   else{
         System.out.print(" ");//print space
   }
}
 System.out.print("\n");//move to next line
}
}
}

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