JavaScript中while循环练习

1. 1-100奇偶数求和

var num = 1;
			var sum = 0;
			var odd = 0; 
			
			while(num <= 100){
				if(num % 2 == 1){
					console.log(num + "是奇数");
					odd = odd + num;
				}else{
					console.log(num + "是偶数");
					sum = sum + num;
				}
				
				num++;
			}

2. 现在有1000元，一年利息为4%，多少年后会超过5000元;

var money = 1000;
var year = 1;
var flag = true;

while(flag){
	money = money * 1.04;
	year++;
	if(money >= 5000){
		flag = false;
	}
	console.log("第" + year + "年" + "money = " + money + "元");
}

3. 0000-20220所有 平年 + 所有闰年

var year1 = 0000;
			var count1 = 0;//计数普通闰年
			var count2 = 0;//计数实际闰年
			
			while(year1 <= 2020){
				if(year1 % 4 == 0 && year1 % 100 != 0){
					console.log(year1 + "为普通闰年");
					count1++;
				}else if(year1 % 400 == 0){
					console.log(year1 + "为世纪闰年");
					count2++;
				}
				year1++;
			}
			console.log(count1);
			console.log(count2);

4.  一张纸厚度0.1mm 对折一次厚度翻倍,对折多少次超过珠穆朗玛峰8848m;
   

var weight = 0.1;//8848 * 100 * 10
		var count = 0;
		
		while(weight <= 8848 * 100 * 10){
			weight *= 2;
			count++;
		}
		console.log(count);
		
		

5. 操场大约一百多人,三个三个排剩一个,四个四个排剩二个,五个五个排剩二个;

var num = 100;//num = Math.floor(num / 3) + 1 =
			var flag = true;
			while(flag){
				if(num % 3 == 1 && num % 4 == 2 && num % 5 == 2){
					console.log(num);
					flag = false;
				}
				num++;
			}

6. 石头剪刀布

var success = 0;
		var lose = 0;
		while (success < 2 && lose < 2 ){
			var player = prompt("请输入你的猜拳");
			if(player != "" && player != null){
				var computer = Math.floor(Math.random() * 3);
				switch (computer){
					case 0:
						computer = "剪刀";
						break;
					case 1:
						computer = "石头";
						break;
					case 2:
						computer = "布";
						break;
				}
				console.log("computer = " + computer);
				if(player == computer){
					console.log("平局")
				}else if (player == "剪刀" && computer == 2 || player == "石头" && computer == 0 || player == "布" && computer == 3){
					console.log("玩家赢");
					success++;
				}else{
					console.log("电脑赢");
					lose++;
				}
			}else{
				console.log("输入有误");
			}
			
		}
		console.log(success);
		if(success == 2){
			console.log("玩家取得最终胜利");
		}else{
			console.log("电脑取得最终胜利");
		}
		

7. 水箱有水120立方，每小时进水12立方，出水30立方，多少小时排完水

var hour = 0;
		var water = 120;
		
		while(water > 0){
			hour++; 
			//water = 120 - (30 - 12) * hour;
			water += 18; 
			water -= 30;
			
		}
		console.log(hour);