Diamond star pattern printing using java

March 9, 2021

Diamond star pattern printing

For diamond star pattern printing in java programming, we need to use six loops.

The first For loop is outer loop which contain two For loop. first inner For loop is to print spaces and second inner For loop print the star to make the pyramid of star.

Now the second outer For loop also contain the two For loop, in which the first For loop is to print the spaces and second For loop print start to make the reverse pyramid of star.

this two opposite pyramid makes a diamond star pattern

Write a program to print the following pattern

Enter the number of row 5

    *
   ***
  *****
 *******
*********
 *******
  *****
   ***
    *

Working

Step 1- Declare the for outer loop for the first pyramid

Step 2- Declare the first inner loop inside the first outer loop for printing spaces.

Step 3- Declare the second inner loop inside the first outer loop for printing star.

Step 4- Declare second the outer for loop for the second reverse pyramid.

Step 5-Declare the first inner loop inside the second outer loop for printing space.

Step 6- Declare the second inner loop inside the second outer loop for printing star.

Step 7 – Stop.

JAVA

Python

#include <stdio.h>  
int main()  
{
    int n, i, j;
    printf(“Enter number of rows : “);
    scanf(“%d”,&n);
    for(i=1; i<=n; i++)
    {
        for(j=1;j<=n–i;j++)
        {
            printf(” “);
        }
        for(j=1;j<=i*2–1;j++)
        {
            printf(“*”);
        }
        printf(“\n“);  
    }
    for(i=n–1;i>0;i–)
    {
        for(j=1;j<=n–i;j++)
        {
            printf(” “);
        }
        for(j=1;j<=i*2–1;j++)
        {
            printf(“*”);
        }
        printf(“\n“);
    }
    return 0;
}

JAVA

// import scanner class for taking user input
import java.util.Scanner;
public class Main
{
      public static void  main(String[] args)
      {
           //scanner class declaration
           Scanner sc=new Scanner(System.in);
           //taking user input
           System.out.print("Enter the number of row ");
           int n=sc.nextInt(); 
           //declare for loop for print first pyramid
           for(int i=1;i<=n;i++)
           {
                 for(int j=1;j<=n-i;j++)
                 {
                       System.out.print(" ");
                 }
                 for(int j=1;j<=i*2-1;j++)
                 {
                       System.out.print("*");
                 }
                 System.out.println();
           } 
           //declare for loop for print reverse pyramid
           for(int i=n-1;i>0;i--)
           {
                 for(int j=1;j<=n-i;j++)
                 {
                       System.out.print(" ");
                 }
                 for(int j=1;j<=i*2-1;j++)
                 {
                       System.out.print("*");
                 }
                 System.out.println();
           }
      }
}

Python

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Diamond star pattern printing using java