Sample code sharing on how to use counters in Java to solve a population growth problem

How to use counters in Java to solve a population growth problem sample code sharing

/**
 * Created by liwenj on 2017/7/17.
 * 问题：某学校现今人数25万，以每年25%的增长速度，多久可到达100万？
 */

public class test11 {
    public static void main(String[] args) {
        //i为计数器，存储循环的次数
        int i=0;
        double num=25;
        int year=2012;
        double speed=0.25;
        while(num<100){
            num=num*(1+speed);
            i++;
        }
        System.out.println("到"+(year+i)+"年，人数到达100万");
    }
}

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