Hollow Pyramid star pattern in Java language

Hollow Pyramid star pattern in Java language

In this article, we will discuss the Hollow Pyramid star pattern in Java language – using loops

In this post, we will learn how to create an hollow Pyramid star pattern using for, while and do-wile loop in Java language

Program to Pyramid using for loop

Program 1

This program allows the user to enter the number of rows and the symbol then the program displays the hollow  pyramid star pattern with the given symbol using for loop in java language

Program 1

import java.util.Scanner;
class Hollow_Pyramid_Star1{
public static void main (String args[]){
Scanner sc=new Scanner(System.in);
System.out.print("Enter the rows: ");
int rows=sc.nextInt();
System.out.print("Enter the symbol: ");
char ch=sc.next().charAt(0);
for(int i=1; i<=rows; i++){//Print each row 
for(int j=i; j<=rows; j++){//Print space for Pyramid shape 
System.out.print(" "); 
} 
for(int j=1; j<=(2*i-1); j++){//print *
if(i==rows || j==1|| j==(2*i-1)){
  
 System.out.print(ch); 
  }
 else {
 System.out.print(" "); 
 }

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

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

 

Pyramid star pattern – using the while loop

Program 2

This program allows the user to enter the number of rows and the symbol then the program displays the hollow  pyramid star pattern with the given symbol using while loop in Java language

import java.util.Scanner;
class Hollow_Pyramid_Star12{
public static void main (String args[]){
Scanner sc=new Scanner(System.in);
System.out.print("Enter the rows: ");
int rows=sc.nextInt();
System.out.print("Enter the symbol: ");
char ch=sc.next().charAt(0);
int i=1;
while(i<=rows){//Print each row 
int j=i;
while( j<=rows){//Print space for Pyramid shape 
System.out.print(" "); 
 j++;
} 
j=1;
while( j<=(2*i-1)){//while loop for print *
if(i==rows || j==1|| j==(2*i-1)){
  
 System.out.print(ch); //print star
  }
 else {
 System.out.print(" "); //print space
 }
j++;
}
 System.out.println(""); //move to next line
 i++;
}
}
}

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

Pyramid star pattern – using the do-while loop

Program 3

This program allows the user to enter the number of rows and the symbol then the program displays the hollow  pyramid star pattern with the given symbol using the do-while loop in Java language

import java.util.Scanner;
class Hollow_Pyramid_Star3{
public static void main (String args[]){
Scanner sc=new Scanner(System.in);
System.out.print("Enter the rows: ");
int rows=sc.nextInt();
System.out.print("Enter the symbol: ");
char ch=sc.next().charAt(0);
int i=1;
do{//Print each row 
int j=i;
do{//Print space for Pyramid shape 
System.out.print(" "); 
 j++;
} while( j<=rows);
j=1;
do{//while loop for print *
if(i==rows || j==1|| j==(2*i-1)){
  
 System.out.print(ch); //print star
  }
 else {
 System.out.print(" "); //print space
 }
j++;
}while( j<=(2*i-1));
 System.out.println(""); //move to next line
 i++;
}while(i<=rows);
}
}

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

 

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Do-while loop in Java language

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If statements in Java language

 

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