Pascal's Triangle Format

Question

The assignment is to create Pascal\'s Triangle without using arrays. I have the method that produces the values for the triangle below. The method accepts an integer for the

Answer 1

public static long pascalTriangle(int r, int k)
{
    if(r == 1 || k <= 1 || k >= r) return 1L;
    return pascalTriangle(r-1, k-1) + pascalTriangle(r-1, k);
}

This method allows you to find the kth value of rth row.

Answer 2

import java.util.*;
class Mine
{
    public static void main(String ar[])
    {
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        for(int i=1;i<n;i++)
        {
            int size=1;
            for(int j=1;j<=i;j++)
            {
                int a[]=new int[size];
                int d[]=new int[size];
                for(int k=1;k<=size;k++)
                {
                    a[1]=1;
                    a[size]=1;

                    for(int p=1;p<=size;p++)
                    {
                        d[p]=a[p];
                    }

                    if(size>=3)
                    {
                        for(int m=2;m<size;m++)
                        {
                            a[m]=d[m]+d[m-1];
                        }
                    }
                }

                for(int y=0;y<size;y++)
                {
                    System.out.print(a[y]);
                }
                System.out.println(" ");
            }
            ++size;
        }
    }
}

Answer 3

public static void main(String[] args)
{
    int a, num;

    for (int i = 0; i <= 4; i++) 
    {
        num = 1;
        a = i + 1;

        for(int j=4;j>0;j--)
        { 
            if(j>i)
                System.out.print(" ");
        }

        for (int j = 0; j <= i; j++) 
        {
            if (j > 0) 
                num = num * (a - j) / j;   

            System.out.print(num + " ");
        }
        System.out.println();
    } 
}

Code perfectly prints pascal triangle

Answer 4

You can try this code in java. It's simple :)

public class PascalTriangle {

public static void main(String[] args) {
    int rows = 10;

    for(int i =0;i<rows;i++) {
        int number = 1;
        System.out.format("%"+(rows-i)*2+"s","");
        for(int j=0;j<=i;j++) {
             System.out.format("%4d",number);
             number = number * (i - j) / (j + 1);

        }
        System.out.println();
    }
  }
}

Answer 5

In each row you will need to print:

• n spaces
• m numbers
• n spaces

Your job is to figure out n (which will be zero in the last line) and m based on row number.

[This is more like a comment but I needed more formatting options than comments provide]

Answer 6

This is a good start, where it's homework, I'll leave the rest to you:

int maxRows = 6;
int r, num;
for (int i = 0; i <= maxRows; i++) {
    num = 1;
    r = i + 1;
    //pre-spacing
    for (int j = maxRows - i; j > 0; j--) {
        System.out.print(" ");
    }
    for (int col = 0; col <= i; col++) {
        if (col > 0) {
            num = num * (r - col) / col;
        }
        System.out.print(num + " ");
    }
    System.out.println();
}