While loop problem

[cmb3587]

My task is to take a user input that ranges from 1-50 and use it to create a triangle of asterisks. I.E:

Enter number: 5

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

I know that i need 2 seperate embedded while loops and that the first one creates a row of asterisks equal to the row number until you reach the input and the second subtracts 1 asterisk until you reach 0.

I can not figure out what is wrong with my code to do this...can someone help please.

import java.util.Scanner;
 
public class triangle {
 
    public static void main(String[] args) {
        Scanner kbd = new Scanner(System.in);
        String asterisk;
        System.out.print("Enter a triangle size (between 1 and 50): ");
        int number = kbd.nextInt();
        asterisk = "*";
        int length = asterisk.length();
        int lines = 0;
        while (lines <= number){
            System.out.println(asterisk);
            lines++;
            while (length <= number) {
                System.out.print(asterisk);
                length++;
            }
        }
        while (lines > 0 ) {
            System.out.println(asterisk);
            lines--;
            while (length <= number) {
                System.out.print(asterisk);
                length++;
            }
        }
 
 
    }
}
 
 

[JosAH]

This has been discussed before; have a look at this thread.

kind regards,

Jos

[bharat bhaskar]

Use this code
i am writing this in c language.
#include <stdio.h>
#include<conio. h>

void main()
{
int i,j,k,l,n;

scanf("%d",&n);
k=n;
l= 1
for(i=0;i<=n;i+ +)
{

for(j=0;j<=k;j+ +)
{
printf(" ");
if(j>=k-l)
{
printf("*");
}
}
l= 2*l + 1;
k = n+1;
printf("/n");


}
}