Java algorithm print Yang Hui triangle

As follows:

First we look at the picture up and down is symmetrical, we first to print the upper part,
1. Use a For loop to do the outer loop control the number of columns printed
for (int i =0;i<10;i++) {//Print 10 columns

 } 2. Also use 2 for loop to print the inner space and * for (int j = 0;j<10-j;j++) {//Print space, no line break                        System.out.print ("")} When a space is printed without wrapping, then printing * can only be placed back face                        for (int k = 0;k<2*i;k++) {//print "*" System.out.print ("*")                                    The complete code is as follows: for (int i=1;i<10;i++) { for (int j = 1; j<10-i;j++) {//Print space System.out.prin                                        T ("");                                                } for (int k = 1;k<2*i;k++) {//print "*"                                        System.out.print ("*");                        } System.out.println ();//print a line after wrapping} This code is printed as follows:  

                3.接下来写下半角，思路和上半角一样，只是循环的条件变了而已                直接上代码：                for(int i=1;i<10;i++) {                            for(int k = 0;k<i;k++) {                                    System.out.print(" ");                            }                            for(int j = 1;j<18-2*i;j++) {                                    System.out.print("*");                            }                            System.out.println();            }            ：

            ok，现在只要将代码拼接就可以了。            完整代码如下：            public class PascalTriangle {public static void main(String[] args) {    for(int i=1;i<10;i++) {                    for(int j = 1 ;j<10-i;j++) {                            System.out.print(" ");                    }                    for(int k = 1;k<2*i;k++) {                                System.out.print("*");                    }                System.out.println();    }    for(int i=1;i<10;i++) {            for(int k = 0;k<i;k++) {                        System.out.print(" ");            }            for(int j = 1;j<18-2*i;j++) {                        System.out.print("*");            }        System.out.println();}

}
}
The main idea of this topic is to use the loop to print space and *, and then use the conditions to limit the number.

Java algorithm print Yang Hui triangle