Java code to display diamond star pattern

Java code to display diamond pattern

In this tutorial, we will discuss Java code to display diamond pattern

Java code to print diamond star pattern — diamond star pattern

In this program, we are going to learn how to displayed diamond star pattern using for loop or nested for loop in Java programming language

here, we display a diamond pattern program with coding using nested for loop and also we get input from the user using Scanner class in Java language

the user can provide numbers as they wish and get the diamond star pattern according to their input

Display star pattern using for loop

Diamond star pattern 1

Program 1

import java.util.Scanner;
class StarDiamond{
public static void main(String args[]){
int i,j,Num_Of_space=1;;
    Scanner scan=new Scanner(System.in);
System.out.print("Enter the number of rows: ");

int rows=scan.nextInt();//get input from user
Num_Of_space=rows-1;
System.out.print("\nYour pattern here\n\n");

    for(i=1; i<=rows; i++){//parent for loop
        for(j=1; j<=Num_Of_space; j++)// for loop to print space
            System.out.print(" ");//print space
            Num_Of_space--;

        for(j=1; j<=2*i-1; j++)
            System.out.print("*");//print asterisk

        System.out.print("\n");

    }

    Num_Of_space=1;
    for(i=1; i<=rows-1; i++){//parent for loop
            for(j=1; j<=Num_Of_space; j++)// for loop to print space
            System.out.print(" ");//print space
    Num_Of_space++;
            

        for(j=1; j<=2*(rows-i)-1; j++)//for loop to print asterisk
            System.out.print("*");//print asterisk
            System.out.print("\n");

        }
}
}

When the above code executed, it produces the following results

Enter the number of rows: 6

Your pattern here
          *
        ***
      *****
    *******
  *********
***********
  *********
    *******
      *****
        ***
          *

Display star pattern using while loop

In this program, we are going to learn how to displayed diamond star pattern using while loop or nested for loop in Java programming language

here, we display a diamond star pattern program with coding using nested while loop and also we get input from the user using Scanner class in Java language

the user can provide numbers as they wish and get the diamond star pattern according to their input

Diamond star pattern 2

Program 2

import java.util.Scanner;
class StarDiamond1{
public static void main(String args[]){
    Scanner scan=new Scanner(System.in);
System.out.print("Enter the number of rows: ");

int rows=scan.nextInt();
     int space=rows-1;
     int i=1,j=1;
    while(j<=rows){//parent wile loop
        System.out.print("\n");//move to next line
        j=1;
        while(j<=space){//while loop for print space
            System.out.print(" ");//print space
            j++;
        }
        j=1;
        while(j<=2*i-1){//while loop for printing star
            System.out.print("*");//print star
            j++;
        }
        i++;
        space--;
    }
    i=rows-1;
    space=1;
    while(i>=1){//parent while loop
        System.out.print("\n");
        j=1;

        while(j<=space){
            System.out.print(" ");//print space
            j++;
        }
        j=1;
        while(j<=2*i-1){
            System.out.print("*");//print star
            j++;
        }
        i--;
        space++;
        }
        }
}

When the above code executed, it produces the following results

Enter the number of rows: 6

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

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