Java program to Display diamond number pattern using while loop
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Java program to Display diamond number pattern using while loop
Java program to Display diamond number pattern using while loop
In this tutorial, we will discuss the concept of Java program to Display diamond number pattern using while loop
In this post, we will learn about how to print diamond number pattern using while loop in Java language.
We can use for loop, while loop or do while loop to display different diamond Number patterns.
Here, we will use while loop to print diamond Number patterns in Java language
The following Java program requests the user to enter the number of rows as the user wanted and the program will display the number of rows in diamond number pattern according to the user input
Program 1
Diamond number pattern 1
import java.util.Scanner; class DiamondNumberWhile1{ public static void main (String args[]){ Scanner scan=new Scanner(System.in); //create a scanner object for input System.out.print("Enter the number of rows: "); int rows=scan.nextInt();//reads rows from user int row=1; int i=rows/2; while( i>0){ //print upper part int j=1; while(j<=i){ System.out.print(" ");//print space j++; } j=1; while(j<=row){ System.out.print(row+" "); j++; } System.out.println();//move to next line row++; i--; } i=0; while( i<=rows/2){ //print lower part int j=1; while (j<=i){ System.out.print(" ");//print space j++; } j=row; while( j>=1){ System.out.print(row+" ");//print number j--; } System.out.println();//move to next line row--; i++; } } }
When the above code is executed, it produces the following result
Enter the number of rows: 8 1 2 2 3 3 3 4 4 4 4 5 5 5 5 5 4 4 4 4 3 3 3 2 2 1
Program 2
Diamond number pattern 2
import java.util.Scanner; class DiamondNumberWhile2{ public static void main (String args[]){ Scanner scan=new Scanner(System.in); //create a scanner object for input System.out.print("Enter the number of rows: "); int rows=scan.nextInt();//reads rows from user int i=1; while(i<=rows){ int j=1; //print upper part while(j<=rows-i){ System.out.print(" ");//print space j++; } int k=i; while(k>=1){ System.out.print(k);//print number k--; } int l=2; while(l<=i){ System.out.print(l);//print number l++; } System.out.println(); i++; } i=rows-1; while(i>=1){ //print lower part for(int j=0; j<=rows-1-i; j++){ System.out.print(" ");//print space } int k=i; while(k>=1){ System.out.print(k); k--; } int l=2; while(l<=i){ System.out.print(l); l++; } System.out.println(); i--; } } }
When the above code is executed, it produces the following result
Enter the number of rows: 6 1 212 32123 4321234 543212345 65432123456 543212345 4321234 32123 212 1
Program 3
Diamond number pattern 3
import java.util.Scanner; class DiamondNumberWhile3{ public static void main (String args[]){ Scanner scan=new Scanner(System.in); //create a scanner object for input System.out.print("Enter the number of rows: "); int rows=scan.nextInt();//reads rows from user for(int i=1; i<=rows; i++){ //print upper part for(int j=1; j<=rows-i; j++){ System.out.print(" "); } for(int k=1; k<=i; k++){ System.out.print(k+" ");//print number with space to upper part } System.out.println(); } for(int i=1; i<=rows-1; i++){ //print lower part for(int j=1; j<=i; j++){ System.out.print(" ");//print space } for(int k=1; k<=rows-i; k++){ System.out.print(k+" ");//print number with space to lower part } System.out.println();//move to next line } } }
When the above code is executed, it produces the following result
Enter the number of rows: 6 1 1 2 1 2 3 1 2 3 4 1 2 3 4 5 1 2 3 4 5 6 1 2 3 4 5 1 2 3 4 1 2 3 1 2 1
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