使用规则打印1至20之间的数字 [英] print numbers between 1- 20 using rules

问题描述

由于我是新手，所以我正在阅读codeacademys的JavaScript教程.本教程要求以下内容:

I am going through codeacademys JavaScript tutorials as i am new to it. The tutorial asks for the following:

打印1到20之间的数字.
规则:
-对于要被3整除的数字，请打印"Fizz".
-对于可被5整除的数字，请打印出嗡嗡声".
-对于可被3和5整除的数字，请在控制台中打印出"FizzBu​​zz".
-否则，只需打印出数字即可.

Print out the numbers from 1 - 20.
The rules:
- For numbers divisible by 3, print out "Fizz".
- For numbers divisible by 5, print out "Buzz".
- For numbers divisible by both 3 and 5, print out "FizzBuzz" in the console.
- Otherwise, just print out the number.

这是我的代码:

for (i=1; i<=20; i++) {

if(i%3==0) {
    console.log("Fizz");
} 
if(i%5==0){
    console.log("Buzz");
}else if (i%5==0 && i%3==0) {
    console.log("fizzBuzz");
} else {
    console.log(i);
}

}

我收到一条错误消息，说我打印出错误数量的项目，有人知道为什么吗?

i am getting an error saying that i am printing out the wrong number of items, anyone know why that is?

推荐答案

当值被3而不是5整除时，将在第一个If语句上打印"Fizz".

When the value is divisible by 3 and not by 5, on the first If statement "Fizz" is printed.

然后在第二个if语句上，命中最后一个else，因此也会打印该数字.您将需要将if(i％5 == 0)更改为else if.

Then on the second if statement, the last else is hit so the number will also be printed. You will need to change the if(i%5==0) to else if.

但是，当(i％5 == 0&& i％3 == 0)时，将出现问题，否则将永远无法实现.您可以通过将其作为第一个比较并将输出更改为FizzBu​​zz来解决此问题.

However there will be a problem now when (i%5==0 && i%3==0) as the else if for that will never be hit. You can fix this by putting this as the first comparison and changing the output to FizzBuzz.

赞:

for ( i = 1; i <= 20; i++) {
    if (i % 5 === 0 && i % 3 === 0) {
        console.log("FizzBuzz");
    } else if (i % 3 === 0) {
        console.log("Fizz");
    } else if (i % 5 === 0) {
        console.log("Buzz");
    } else {
        console.log(i);
    }
};

在继续操作之前，请确保您理解为什么这可以解决您的问题，因为您很可能会再次犯同样的错误.

Make sure you understand why this fixes your issue before you move on as you will most likely make the same mistake again.

如果您想让我更清晰地说明您是否正在努力找出错误原因，请添加评论.

Add a comment if you would like me to explain clearer if you are struggling to work out why you have gone wrong.

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