Java Learning (2), java Learning

Java Learning (2), java Learning

Public class Scoure {public static void main (String args []) {int score = 90; if (score> = 85 & score <= 100) {System. out. println ("excellent");} else if (score> = 65 & score <85) {System. out. println ("good");} else if (score >=60 & score <65) {System. out. println ("pass");} else if (score> = 0 & score <60) {System. out. println ("fail");} else {System. out. println ("score cannot be greater than 100 or less than 0") ;}}// if statement exercise

　　

Public class lianxi {public static void main (String args []) {for (int I = 100; I <201; I ++) {boolean B = false; for (int j = 2; j <I-1; j ++) {int k = I % j; if (k = 0) {B = true ;}} if (! B) {System. out. println (I) ;}}// find the prime number 100-200.

Result:

 

public class xing {    public static void main(String args[]) {        for (int i=1;i<5;i++){            for (int j=0;j<4-i;j++){                System.out.print((" "));            }            for (int k=0;k<i;k++){                System.out.print("*  ");            }                        System.out.println(" ");        }    }}

Running result