Java Program – Pattern 4

For n = 5

1

*

2

**

3

***

4

****

5

*****

6

****

7

***

8

**

9

*

Program

1	public class Pattern {

2

3	public void print(int n) {

4	for (int i = 1; i <= n; i++) {

5	for (int j = 1; j <= i; j++) {

6	System.out.print("*");

7

}

8	System.out.println();

9

}

10	for (int i = n - 1; i >= 1; i--) {

11	for (int j = 1; j <= i; j++) {

12	System.out.print("*");

13

}

14	System.out.println();

15

}

16

}

17

}

The given pattern can be split into two parts. The first part is :

1

*

2

**

3

***

4

****

5

*****

And the second part is

1

****

2

***

3

**

4

*

The first part is the same as this pattern. The second part is same as this pattern with n replaced with n-1.