write a method called printTriangle. How to start?

(Objects first with java, A practical Introduction using Blue J, Third Ed, David J. Barnes & Michael Kolling)

Hi

I have to write a method called printTriangle.

example:  printTriangle(4);

output should look like this:

*
**
***
****

and I don't know how to start. Can you please give me an advice?
bt1942Asked:
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bt1942Author Commented:
chaituu// that seems very complicated, I just need to write a simple method soething like

               
public void printTriangle()
	{
	    int n = 4;
	    String s = "*";
	    for(int row = 1; row<= n; row++)
	    {
	        System.out.println(s);
	      
	       }
	   }
}

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javaexpertoCommented:
the first thing you need is one loop to print "*" and other loop to print a new line. Your first loop will get up to your parameter and the second will enter the first time one,  the second two, etc. The loops must be nested, here the method:
public void printTriangle(int stars) {
    for(int i = 0; i < stars; i++) {
        for(int j = 0; j <= i; j++)  {
	    System.out.print("*");	
	}
	    System.out.println("");
    }
}

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siranmCommented:
here you go....

public void printTriangle()
        {
            int n = 4;
            String s = "*";
            for(int row = 1; row<= n; row++)
            {
 
for(int stars=1; stars<=row;start++){
                System.out.println(s); //1st row->1star, 2nd row->2stars,...                    
}
           }
}

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siranmCommented:
yep, javaexperto, i missed that detail on the new line ; )
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glenjrCommented:
bt1942,

you are on the right track. right now your program prints out:

*
*
*
*

In order to adjust it so that it prints out the way you want you need to the following line below your system.out...:

s+= "*";


Also, make sure your {} match and that you have a main method in there some where.

Let me know if you have questions.

glenjr
0
glenjrCommented:
looks like i wasnt the only one working on it, i wasnt fast enough :)
0
chaitu chaituCommented:
public static void main(String[] args) {

             int n = 4;
           String s = "*";
           String s1 = "";
       for(int row = 1; row<= n; row++)
       {

for(int stars=1; stars<=row;stars++){
      s1+=s;
           System.out.println(s1); .                    
}
      }
       }
0
bt1942Author Commented:
Thanks for your help!
0
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