4) Write a Java program that display's * in triangular form.

 

class displaydemo

{

public static void main(String args[])

{

int n=1;

int ln=1,l;

char ch='*';

while(ln<=5)

{

for(l=1;l<=ln;l++)

{

System.out.print(ch+" ");

}

System.out.println();

ln++;

}

while(ln>0)

{

for(l=1;l<=ln;l++)

{

System.out.print(ch+" ");

}

System.out.println();

ln--;

}

}

}

Output:

To compile this code use  below command

D:\JavaPrograms\SimplePrograms>javac displaydemo.java

To run this code use  below command

D:\JavaPrograms\SimplePrograms> java displaydemo

*

* *

* * *

* * * *

* * * * *

* * * * * *

* * * * *

* * * *

* * *

* *

*