# Java Program to print the diamond shape

Java 8Object Oriented ProgrammingProgramming

A diamond shape can be printed by printing a triangle and then an inverted triangle. An example of this is given as follows −

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

A program that demonstrates this is given as follows.

## Example

Live Demo

public class Example {
public static void main(String[] args) {
int n = 6;
int s = n - 1;
System.out.print("A diamond with " + 2*n + " rows is as follows:\n\n");
for (int i = 0; i < n; i++) {
for (int j = 0; j < s; j++)
System.out.print(" ");
for (int j = 0; j <= i; j++)
System.out.print("* ");
System.out.print("\n");
s--;
}
s = 0;
for (int i = n; i > 0; i--) {
for (int j = 0; j < s; j++)
System.out.print(" ");
for (int j = 0; j < i; j++)
System.out.print("* ");
System.out.print("\n");
s++;
}
}
}

## Output

A diamond with 12 rows is as follows:

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

Now let us understand the above program.

The diamond shape is created by printing a triangle and then an inverted triangle. This is done by using nested for loops. The code snippet for the upper triangle is given as follows.

int n = 6;
int s = n - 1;
System.out.print("A diamond with " + 2*n + " rows is as follows:\n\n");
for (int i = 0; i < n; i++) {
for (int j = 0; j < s; j++)
System.out.print(" ");
for (int j = 0; j <= i; j++)
System.out.print("* ");
System.out.print("\n");
s--;
}

The code snippet for the inverted lower triangle is given as follows.

s = 0;
for (int i = n; i > 0; i--) {
for (int j = 0; j < s; j++)
System.out.print(" ");
for (int j = 0; j < i; j++)
System.out.print("* ");
System.out.print("\n");
s++;
}
Published on 06-Dec-2018 06:38:56
Advertisements