Thread: Loop Patterns (triangles) [Beginner]

If you need to read in user input from the console then take a look at the Scanner class.

http://www.javaprogrammingforums.com...ner-class.html

Your going to need to use 'for loops' for this also

http://www.javaprogrammingforums.com...ava-loops.html

Take a look at those examples and write some code. Post it here and we will help you move forward...

import java.util.Scanner;
public class Triangles {
 
    public static void main(String[] args) {
    Scanner keyboard = new Scanner(System.in);
 
        int pattern;    
 
        System.out.println(" - - - Welcome to Bhaswar's Traingle/Diamond Patterns - - - ");
        System.out.println("Which pattern do you want to print?");
        System.out.println("1) 54321   2)     1   3) 12345   4)   1");
        System.out.println("   4321          12      1234        123");
        System.out.println("   321          123      123        12345");
        System.out.println("   21          1234      12          123");
        System.out.println("   1          12345      1            1");
        System.out.print("Enter your choice (5 to quit):");
    while ((pattern = keyboard.nextInt()) >= 1 && pattern <= 5)
    {
        switch (pattern)
        {
        case 1:
            System.out.print("How many rows would you like to print? More than 1 please:");
             int r1 = keyboard.nextInt();
 
             for (int i=1; i<=r1; i++)
             {
                 for (int j=r1; j>=i; j--)
                 {
 
                        System.out.print("" +j);}
                        System.out.print("\n");
        }
        }
 
    }
 
    }
}

this is all i currently have
with a bit of mucking about i've gotten the numbers for the first triangle to look like:
54321
5432
543
54
5
unfortunately thats not what i'm trying to get
i'm aiming for
54321
4321
321
21
1

any suggestions? i can't figure out how to get the 2nd second line starting from 4 and the 3rd line starting from 3 and so on...