java - 如何让 while 语句打印出每第三个数字？

Question

如何让 while 语句打印出每第三个数字？

我知道这会打印出从 0 到 100 的所有数字:

package WhileStatement;

import java.util.Scanner;

public class WhileStatementOne {

        //See the Scanner packet for more info.
    static Scanner input = new Scanner(System.in);
    public static void main(String[] args){
        countNumber();
    }
        //We can now call ' countNumber ' at any time in this code.
    private static void countNumber(){
        // This is the whilestatement.
        int i = 0;
        while(i <=100){
            System.out.println(i);
            i++;
        }
    }
}

但是我怎样才能让它打印出这个:

3
6
9
12
15
etc...

Answer 1

尝试:

int i = 1;
while (i++ <= 100){
    if ( i % 3 == 0 ) {
        System.out.println(i);
    }
}

或者:

int i = 3;
while (i <= 100){
    System.out.println(i);
    i += 3;
}

甚至:

for (int i : new Range(3,100,3)) {
    System.out.println(i);
}