for 循環(huán)

for 循環(huán)語法格式

for ( 初始化循環(huán)變量, 循環(huán)條件表達(dá)式, 迭代部分 )

例如我所寫的一個判斷兩個年份之間所有的閏年的小東西 (代碼拙劣...)

import java.util.Scanner;

public class Demo1 {

public static void main(String[] args) {

// 獲取用戶輸入年份

Scanner scanner = new Scanner(System.in);

System.out.println("計(jì)算兩個年份區(qū)間內(nèi)的閏年");

System.out.print("請輸入第一個年份 : ");

int year1 = scanner.nextInt();

System.out.print("請輸入第二個年份 : ");

int year2 = scanner.nextInt();

int year3;

// 如果輸入的第二個年份小于第一個年份則交換其數(shù)值

if (year1 > year2) {

year3 = year1;

year1 = year2;

year2 = year3;

}

int a;

int c = 0;

Integer b = null;

System.out.print(year1 + "到" + year2 + "間的閏年有 : ");

// 檢測其是否屬于閏年

for (a = year1 ; a <= year2 ; a++){

if (a % 4 == 0 && a % 100 != 0) {

b = a;

System.out.print(b + " ");

c++;

} else if (a % 400 == 0 ){

b = a;

System.out.print(b + " ");

c++;

}

}

System.out.println(",共" + c + "個.");

}

}