Console C# Triangle

[nobiggieBIG]

Task 9.4 – Triangle

Tricky one this: Write a program that programmatically draws a triangle on the screen as below:

*

**

***

****

*****

******

*******

********

*********

**********

 

C#

[Totalschaden1997]

So... what's your question?

[nobiggieBIG]

1 minute ago, Totalschaden1997 said:

So... what's your question?

Im trying fiddling with this, but I cant figure it out

 

            int userRows;
            int userCols;

            userCols = 10;
            userRows = 10 - 1;

            for (int row = 0; row < userRows; row = row - 1)
            {

                for (int col = 1; col < userCols; col = col + 1)
                {
                    Console.Write("*");
                }
                Console.WriteLine();
            }

            Console.WriteLine("Press a key to stop");
            Console.ReadKey();

 

[juretrn]

What you wrote  would probably print something like ********* in 10 lines. 

What I'd do is have a variable before the start of after the nested loop that increments by 1 every time the outer loop is called.

 int userRows;
            int userCols;

            userCols = 1;
            userRows = 10 - 1;

            for (int row = 0; row < userRows; row = row - 1)
            {
                for (int col = 1; col < userCols; col = col + 1)
                {
                    Console.Write("*");
                }
				userCols++;
                Console.WriteLine();
            }

 

[TheStar19]

Would this do it?

 

for (int i = 0; i <= length; i++)
            {
                for (int j = 0; j <= i; j++)
                {
                    Console.Write("*");
                }
                Console.WriteLine();
            }
            Console.ReadKey();

 

[nobiggieBIG]

            int i, j;

            for (i = 0; i < 10; i++)
            {
                for (j = 0; j <= 1 * i; j++)
                    Console.Write("*");

                for (j = 10 - i; j > 0; j--)
                    Console.Write(" ");

                Console.WriteLine();

            }

            Console.WriteLine("Press a key to stop");
            Console.ReadKey();

Got it

[Mira Yurizaki]

using System;
        
public class Program
{
    public static void Main()
    {
        for(int i = 0; i < 10; i++){
            string triangle = "";
            for(int j = 0; j < i+1; j++){
                triangle += "*";
            }
            Console.WriteLine(triangle);
        }
    }
}

Hoy.

 

https://dotnetfiddle.net/3zBKdA

[straight_stewie]

If you want to be really cool you could even do something like:
 

using System;
        
public class Program
{
    public static void Main()
    {
        string triangle = "";
        for(int i = 0; i < 10; i++){;
            for(int j = 0; j < i+1; j++){
                triangle += "*";
            }
            triangle += "\n";
        }
      
      	Console.WriteLine(triangle);
    }
}

I wonder, how many different ways I could come up with to draw a triangle of asterisks to the screen before the end of the day. 

[Mira Yurizaki]

47 minutes ago, straight_stewie said:

If you want to be really cool you could even do something like:
 

using System;
        
public class Program
{
    public static void Main()
    {
        string triangle = "";
        for(int i = 0; i < 10; i++){;
            for(int j = 0; j < i+1; j++){
                triangle += "*";
            }
            triangle += "\n";
        }
      
      	Console.WriteLine(triangle);
    }
}

I wonder, how many different ways I could come up with to draw a triangle of asterisks to the screen before the end of the day. 

Nitpitcky, but would change triangle += "\n"; to triangle += System.Environment,NewLine; (or whatever it is) to ensure new line correctness.

[XtremeDev]

If simplicity is key, there's always the handy string constructor for repeating characters "X" amount of times.

 

I'd do it like this:

public class Program
{
    public static void Main(string[] args)
    {
        for(int i =0; i < 10;i++)
            Console.WriteLine(new string('*', i+1));
    }
}

 

[nobiggieBIG]

7 hours ago, XtremeDev said:

If simplicity is key, there's always the handy string constructor for repeating characters "X" amount of times.

 

I'd do it like this:

public class Program
{
    public static void Main(string[] args)
    {
        for(int i =0; i < 10;i++)
            Console.WriteLine(new string('*', i+1));
    }
}

 

ill look at this when i can get c# working on visual studio community