Java Program for Half Diamond Star Pattern

May 24, 2020

Printing Half Diamond Star Pattern

In this program we’re going to code half diamond star pattern  

In this program take a input from user and store in inside the variable as no and then  take for loop start from i=1 to i<=no and then take another for loop to print star which is start from j=1 to j<=i , and then take second another inner for loop start from i=no-1 to i>0 and then take j inner for loop start from i=1 to j<=i then print star statement  after that take line changement  

Java Program for Half Diamond Star Pattern

Algorithm:

  • Enter the number as input from the user and store it in any variable.(‘no‘ in this case).
  • Run a loop ‘no’ number of times to iterate through each of the rows. From i=1 to i<=no. The loop should be structured as for (int i = 1; i <= no; i++)
  • Inside the main loop take another loop start with j=1 to j<=i and print above stars as System.out.print(“*”); after this inside loop take System.out.println(); to take a new line
  • After the main loop take another loop to make downwards stars loop start with int i = no-1 to i >0; inside this take another loop to print stars for (int j = 1; j <=i; j++) 

Code in Java:

import java.util.Scanner;
public class Pattern1 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		System.out.println("Enter no");
		int no=sc.nextInt();
		
		for (int i = 1; i <= no; i++) {
			for (int j = 1; j <= i; j++) 
				System.out.print("*");
			System.out.println();
		}
		for (int i = no-1; i >0; i--) {
			for (int j = 1; j <=i; j++) 
				System.out.print("*");
			System.out.println();
		}
	}

}
This code is contributed by Shubham Nigam (Prepinsta Placement Cell Student)

2 comments on “Java Program for Half Diamond Star Pattern”


  • jiteshghormade28

    import java.util.Scanner;
    public class DiamondPattern{
    public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    System.out.print(“Enter row :”);
    int r = sc.nextInt();
    for(int i =1;i<=r;i++){
    if(i<=(r/2+1)) {
    for(int j =1;j<=i;j++){
    System.out.print("*");
    }
    }else {
    for(int k = 1;k<=(r+1-i);k++){
    System.out.print("*");
    }
    }
    System.out.println();
    }
    }
    }

    1