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I am doing my first java assignment and this is my question. I am required to write a program that prints a sideways triangle.
For example:
Input a number: 6
*
* *
* * *
* * * *
* * * * *
* * * * * *
Appreciate for the help! Many thanks.

What I have tried:

Java
<pre>import java.util.Scanner;
class RightTriangle {
    public static void main(String args[])
    {
        Scanner sc = new Scanner(System.in);
        int n=sc.nextInt();
        int a, b;
        for(a = 0; a < n; a++) {
            for(b = 0; b <= a; b++) {
                System.out.print("* ");
            }
            System.out.println();
        }
    }
}
Posted
Updated 8-Jul-22 11:23am
Comments
Patrice T 8-Jul-22 14:47pm    
But what is your problem or question ?

The only thing you seem to have forgotten is to prompt the user for a "number of lines" input:
Scanner sc = new Scanner(System.in);
System.out.print("Input a number: ");
int n=sc.nextInt();
Other than that, a quick test says you are about there.
 
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You miss to add
Java
Scanner sc = new Scanner(System.in);
System.out.println("Input a number: "); // to get the user's input 
Other than that, the code should work fine. Good luck!
 
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v2
Quote:
I am doing my first java assignment and this is my question.

You actually provided no question, and your code works, what is your problem ?
As spotted in Solution 2, the main problem is that you do not prompt the user to input the triangle size, it is not an error, it is only not user friendly.

Your code do not behave the way you expect, or you don't understand why !

There is an almost universal solution: Run your code on debugger step by step, inspect variables.
The debugger is here to show you what your code is doing and your task is to compare with what it should do.
There is no magic in the debugger, it don't know what your code is supposed to do, it don't find bugs, it just help you to by showing you what is going on. When the code don't do what is expected, you are close to a bug.
To see what your code is doing: Just set a breakpoint and see your code performing, the debugger allow you to execute lines 1 by 1 and to inspect variables as it execute.

Debugger - Wikipedia, the free encyclopedia[^]

Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]
Basic Debugging with Visual Studio 2010 - YouTube[^]

<
jdb - The Java Debugger[^]
https://www.jetbrains.com/idea/help/debugging-your-first-java-application.html[^]

The debugger is here to only show you what your code is doing and your task is to compare with what it should do.
 
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