java asterisk right triangle

Question

I\'d like to try a right triangle asterisk. But I only got this output: (I can\'t place here the asterisk)

@ 
@@
@@@

what

Answer 1

Try This :

public class PrintPyramidStar {  

   public static void main(String args[]) {  

    int c = 1;  
    for (int i = 1; i <= 5; i++) {  
        for (int j = i; j < 5; j++) {  
            System.out.print(" ");
        }  
        for (int k = 1; k <= c; k++) {  
            if (k % 2 == 0)  
                System.out.print(" ");  
            else  
                System.out.print("*");  
        }  
        System.out.println();  
        c += 2;  
    }  
  }  
}  

Answer 2

Try the following:

import java.io.*;
public class Star2 {

    public static void main(String[] args)throws IOException {

        InputStreamReader read = new InputStreamReader(System.in);
        BufferedReader in = new BufferedReader(read);
        int i,j,n=0,k;
        System.out.print("How many stars you want to print in first row ? ");
        n=Integer.parseInt(in.readLine());
        for (i = 0; i<n; i=i+2)
        {
            for (j=i; j<n;j++)
            System.out.print ("*");
            System.out.println();
        }
    }

}

Answer 3

for(int i = 0; i < 9; i++) {
    for(int j = 9; j > 0; j--)
        System.out.print(i < j ? " " : "*");

    System.out.println();
}

Answer 4

Your code never prints any spaces, that should be a problem.

You can use this simple approach:

for (int i = 0; i < 3; i++) System.out.println("  @@@".substring(i, i+3));

The logic is quite simple: you have the string with two spaces and three at-signs. The first line of output needs to be two spaces and a single at-sign, so that's the first three chars of the string. The second line should be one space and two at-signs—that's the three chars of the string after skipping the first one; and so on: you just slide through the string, each time skipping one more from the beginning and taking the next three chars.

Demo

Answer 5

Your problem is that you are not outputting any white space. Calculate how much whitespace you need to offset each line first, output this white space then output your *'s