Most asked Pyramid pattern programs in Java

Below C concepts are used to print that patterns

• For Loop
• While Loop
• if..else

1). Program to print half pyramid pattern using star(*) in Java

import java.util.*;  
class Main{
    public static void main(String ...a){
    int i=0,temp=0,j;
    Scanner sc= new Scanner(System.in);
    System.out.print("Enter the number of rows for half pyramid: ");  
    int n= sc.nextInt();  
    for(i=1;i<=n;i++){
		    for(j=1;j<=i;j++){
                     System.out.print("*");
		    }
		System.out.println("");
	    }
    }
} 

Output

Enter the number of rows for half pyramid: 5
*
**
***
****
*****

2). Program to print Inverted half Pyramid Pattern using Star(*) in Java

import java.util.*;  
class Main{
    public static void main(String ...a){
    int i=0,temp=0,j;
    Scanner sc= new Scanner(System.in);
    System.out.print("Enter the number of rows for half pyramid: ");  
    int n= sc.nextInt();  
    for(i=n;i>=1;i--){
		    for(j=i;j>=1;j--){
                     System.out.print("*");
		    }
		System.out.println("");
	    }
    }
} 

Output

Enter the number of rows for half pyramid: 5
*****
****
***
**
*

3). Program to print Right Half Pyramid Pattern using Star(*) in Java

import java.util.*;  
class Main{
    public static void main(String ...a){
    int i=0,temp=0,j,k;
    Scanner sc= new Scanner(System.in);
    System.out.print("Enter the number of rows for half pyramid: ");  
    int n= sc.nextInt();  
    for(i=n;i>=1;i--){
		    for(j=i;j>=2;j--){
                     System.out.print(" ");
		    }
		    for(k=1;k<=n-i+1;k++){
		        System.out.print("*");
		    }
		System.out.println("");
	    }
    }
} 

Output

Enter the number of rows for half pyramid: 5
    *
   **
  ***
 ****
*****

4). Program to print Inverted Right half Pyramid Pattern using star(*) in Java

import java.util.*;  
class Main{
    public static void main(String ...a){
    int i=0,temp=0,j,k;
    Scanner sc= new Scanner(System.in);
    System.out.print("Enter the number of rows for half pyramid: ");  
    int n= sc.nextInt();  
    for(i=n;i>=1;i--){
		for(j=1;j<=n-i;j++){
            System.out.print(" ");
		}
		for(k=1;k<=i;k++){
		    System.out.print("*");
		}
		System.out.println("");
	    }
    }
} 

Output

Enter the number of rows for half pyramid: 5
*****
 ****
  ***
   **
    *

5). Program to Print full Pyramid pattern using Star(*) in Java

import java.util.*;  
class Main{
    public static void main(String ...a){
    int i=0,temp=0,j,k;
    Scanner sc= new Scanner(System.in);
    System.out.print("Enter the number of rows for pyramid: ");  
    int n= sc.nextInt();  
    for(i=n;i>=1;i--){
		    for(j=i;j>=2;j--){
                     System.out.print(" ");
		    }
		   for(k=1;k<=2*(n-i+1)-1;k++){
		        System.out.print("*");
		    }
		System.out.println("");
	    }
    }
} 

Output

Enter the number of rows for pyramid: 5
    *
   ***
  *****
 *******
*********

6). Program to print Inverted full Pyramid pattern using Star(*) in Java

import java.util.*;  
class Main{
    public static void main(String ...a){
    int i=0,temp=0,j,k;
    Scanner sc= new Scanner(System.in);
    System.out.print("Enter rows for Inv. Full Pyramid Pattern: ");  
    int n= sc.nextInt();  
    for(i=n;i>=1;i--){
		    for(j=1;j<=n-i;j++){
                     System.out.print(" ");
		    }
		   for(k=1;k<=2*i-1;k++){
		        System.out.print("*");
		    }
		System.out.println("");
	    }
    }
} 

Output

Enter rows for Inv. Full Pyramid Pattern: 5
*********
 *******
  *****
   ***
    *

7). Program to print half pyramid pattern using numbers in Java

import java.util.*;  
class Main{
    public static void main(String ...a){
    int i,j,k;
    Scanner sc= new Scanner(System.in);
    System.out.print("Enter no. of rows for half pyramid: ");  
    int n= sc.nextInt();  
    for(i=1;i<=n;i++){
		for(j=1;j<=i;j++){
            System.out.print(j);
		    }
		System.out.println("");
	    }
    }
} 

Output

Enter no. of rows for half pyramid: 5
1
12
123
1234
12345

8). Program to print Inverted half Pyramid Pattern using numbers in Java

import java.util.*;  
class Main{
    public static void main(String ...a){
    int i=0,temp=0,j,k;
    Scanner sc= new Scanner(System.in);
    System.out.print("Enter the number of rows for half pyramid: ");  
    int n= sc.nextInt();  
    for(i=0;i<n;i++){
		    for(j=1;j<=n-i;j++){
                     System.out.print(j);
		    }
		 System.out.println("");
	    }
    }
} 

Output

Enter the number of rows for half pyramid: 5
12345
1234
123
12
1