Print Hollow Diamond Number Pattern
In the previous article, we have discussed Java Program to Print Diamond Number Pattern
In this article we are going to see how to print hollow diamond number pattern.
- Java Code to Print Hollow Diamond Number Pattern
- C Code to Print Hollow Diamond Number Pattern
- C++ Code to Print Hollow Diamond Number Pattern
Example-1 When rows value = 5 1 2 2 3 3 4 4 5 5 4 4 3 3 2 2 1
Now, let’s see the actual program to print it.
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Approach:
- Enter total number of rows and store it in an integer variable rows
- Take two outer for loops(for both halves) to iterate the rows.
- Take two inner for loops to print both space and number.
- After each iteration print a new line.
Java Code to Print Hollow Diamond Number Pattern
import java.util.Scanner;
class pattern
{
public static void main(String[] args)
{
//Create a new Scanner object
Scanner scan = new Scanner(System.in);
//Taking total number of rows as input from user
System.out.print("Rows : ");
int rows= scan.nextInt();
//Row and column are the iterators and counter to print
int numberOfRows, numberOfColumns;
//Outer loop to print the lower half
//Iterates from 1 to the number of rows entered by the user
for (numberOfRows = 1; numberOfRows <= rows; numberOfRows++)
{
//Inner loop to print the space
for (numberOfColumns = rows; numberOfColumns >= (numberOfRows - 1) * 2 - 1; numberOfColumns--)
{
System.out.print(" ");
}
System.out.print(numberOfRows);
//inner loop to print the number
for (numberOfColumns = 2; numberOfColumns <= (numberOfRows - 1) * 4; numberOfColumns++)
{
System.out.print(" ");
}
if (numberOfRows > 1)
System.out.print(numberOfRows);
//Prints a newline
System.out.println();
}
//Outer loop to print the lower half
//Iterates from number of rows-1 entered by user to 1
for (numberOfRows = rows - 1; numberOfRows >= 1; numberOfRows--)
{
//Inner loop to print the space
for (numberOfColumns = rows; numberOfColumns >= (numberOfRows - 1) * 2 - 1; numberOfColumns--)
{
System.out.print(" ");
}
System.out.print(numberOfRows);
//inner loop to print the number
for (numberOfColumns = 2; numberOfColumns <= (numberOfRows - 1) * 4; numberOfColumns++)
{
System.out.print(" ");
}
if (numberOfRows > 1)
System.out.print(numberOfRows);
//Prints a newline
System.out.println();
}
}
}
Output Rows : 7 1 2 2 3 3 4 4 5 5 6 6 7 7 6 6 5 5 4 4 3 3 2 2 1
C Code to Print Hollow Diamond Number Pattern
#include <stdio.h>
int main()
{
//Taking total number of rows as input from user
printf("Rows : ");
int rows;
scanf("%d", &rows);
//Row and column are the iterators and counter to print
int numberOfRows, numberOfColumns;
//Outer loop to print the lower half
//Iterates from 1 to the number of rows entered by the user
for (numberOfRows = 1; numberOfRows <= rows; numberOfRows++)
{
//Inner loop to print the space
for (numberOfColumns = rows; numberOfColumns >= (numberOfRows - 1) * 2 - 1; numberOfColumns--)
{
printf(" ");
}
printf("%d", numberOfRows);
//inner loop to print the number
for (numberOfColumns = 2; numberOfColumns <= (numberOfRows - 1) * 4; numberOfColumns++)
{
printf(" ");
}
if (numberOfRows > 1)
printf("%d", numberOfRows);
//Prints a newline
printf("\n");
}
//Outer loop to print the lower half
//Iterates from number of rows-1 entered by user to 1
for (numberOfRows = rows - 1; numberOfRows >= 1; numberOfRows--)
{
//Inner loop to print the space
for (numberOfColumns = rows; numberOfColumns >= (numberOfRows - 1) * 2 - 1; numberOfColumns--)
{
printf(" ");
}
printf("%d", numberOfRows);
//inner loop to print the number
for (numberOfColumns = 2; numberOfColumns <= (numberOfRows - 1) * 4; numberOfColumns++)
{
printf(" ");
}
if (numberOfRows > 1)
printf("%d", numberOfRows);
//Prints a newline
printf("\n");
}
return 0;
}
Output:
Rows : 7
1
2 2
3 3
4 4
5 5
6 6
7 7
6 6
5 5
4 4
3 3
2 2
1
C++ Code to Print Hollow Diamond Number Pattern
#include <iostream>
using namespace std;
int main(int argc, char const *argv[])
{
//Taking total number of rows as input from user
cout << "Rows : ";
int rows;
cin >> rows;
//Row and column are the iterators and counter to print
int numberOfRows, numberOfColumns;
//Outer loop to print the lower half
//Iterates from 1 to the number of rows entered by the user
for (numberOfRows = 1; numberOfRows <= rows; numberOfRows++)
{
//Inner loop to print the space
for (numberOfColumns = rows; numberOfColumns >= (numberOfRows - 1) * 2 - 1; numberOfColumns--)
{
cout << " ";
}
cout << numberOfRows;
//inner loop to print the number
for (numberOfColumns = 2; numberOfColumns <= (numberOfRows - 1) * 4; numberOfColumns++)
{
cout << " ";
}
if (numberOfRows > 1)
cout << numberOfRows;
//Prints a newline
cout << endl;
}
//Outer loop to print the lower half
//Iterates from number of rows-1 entered by user to 1
for (numberOfRows = rows - 1; numberOfRows >= 1; numberOfRows--)
{
//Inner loop to print the space
for (numberOfColumns = rows; numberOfColumns >= (numberOfRows - 1) * 2 - 1; numberOfColumns--)
{
cout << " ";
}
cout << numberOfRows;
//inner loop to print the number
for (numberOfColumns = 2; numberOfColumns <= (numberOfRows - 1) * 4; numberOfColumns++)
{
cout << " ";
}
if (numberOfRows > 1)
cout << numberOfRows;
//Prints a newline
cout << endl;
}
return 0;
}
Output: Rows : 7 1 2 2 3 3 4 4 5 5 6 6 7 7 6 6 5 5 4 4 3 3 2 2 1
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