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This article mainly introduces "how to use java to output Yang Hui triangle". In daily operation, I believe many people have doubts about how to use java to output Yang Hui triangle. The editor consulted all kinds of data and sorted out a simple and easy-to-use operation method. I hope it will be helpful to answer the doubt of "how to use java to output Yang Hui triangle". Next, please follow the editor to study!

The Yang Hui triangle is arranged by numbers, which can be regarded as a digital table. Its basic characteristic is that the values on both sides are 1, and the values in other positions are the sum of the values in the upper left and the upper right. The idea of printing Yang Hui triangle is that there are spaces in front of each line, and the number of spaces in each line needs to be determined according to the total number of lines, which can be summed up by finding rules. The key is the implementation of the numeric value, the value of each row (except the first column and the last column) is the sum of the two values of the previous row, so it can be obtained from the previous row. When printing Yang Hui triangle, you need to use the for loop statement. The steps are as follows:

(1) create a test class, declare the num () method in the class, and pass in two parameters, x and y, in the num () method. Where x represents the row and y represents the column. The num () method is used to calculate the value of row x and column y. The code is as follows:

Public static int num (int x, int y) {

If (y = = 1 | | y = = x) {

Return 1

}

Int c = num (x-1, y-1) + num (x-1, y)

Return c

}

(2) create a method named calculate, and pass in a parameter of type int, which represents the number of lines printing Yang Hui's triangle. The code is as follows:

Public static void calculate (int row) {

For (int I = 1; I

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