Java programming implements two output results of Pascal's triangle example code

Firstly, let's show the results:

Introduction:

Yang Hui's triangle is a geometric arrangement of binomial coefficients in a triangle. In Europe, this table is called Pascal's triangle. Pascal (1623----1662) is located at1654year, later than Yang Hui in discovering this law393year, later than Jia Xian6In the year 00, Yang Hui's triangle is one of the outstanding research achievements of ancient Chinese mathematics. It graphically represents the binomial coefficients and intuitively embodies some algebraic properties of combinations within the figure, which is a beautiful combination of discrete numbers and shapes.

Example code is as follows:

package com.sxt;
import java.util.Arrays;
public class KeBen {
	public static void main(String[] args) {
		int[][] array =new int []10][10];
		array [0]=new int[]{1};
		//The first row is1
		for (int i=1;i<10;i++{
			array[i]=new int [i+1];
			for (int j=0;j<i+1;j++{
				if(j==0||j==i){
					//Boundary special treatment
					array[i][j]=1;
				}
					//Equal to the sum of the two shoulders of the previous row
					array[i][j]=array[i-1][j]+array[i-1][j-1];
				}
			}
		}
		//Simple output
		for (int i=0;i<10;i++{
			System.out.println(Arrays.toString(array[i]));
		}
		//Layout output
		for (int i=0;i<10;i++{
			for (int j=0;j<10-i-1;j++{
				System.out.print(" ");
				//Two spaces
			}
			for (int j=0;j<=i;j++{
				String a=""+array[i][j];
				//Convert to string
				//Consider separately when the string length is different
				if(a.length()==1{
					a=" "+a+" ";
				}
				if(a.length()==2{
					a=" "+a;
				}
				System.out.print(a+" ";
			}
			System.out.println();
		}
	}
}

Summary

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