javascript 判断一个数是否能被 3 或 5 整除 (FizzBuzz)
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Find if a number is divisible by 3 or 5 (FizzBuzz)
提问by Corey Blinks
How do I change the output depending on whether or not it is divisible by 3 or 5? If it is divisible by 3, I want to show "rock" and if it's divisible by 5 I want to show "star" (similar to in FizzBuzz). If both, they'll see both.
如何根据输出是否可被 3 或 5 整除来更改输出？如果它可以被 3 整除，我想显示“rock”，如果它可以被 5 整除，我想显示“star”（类似于在 FizzBuzz 中）。如果两者都有，他们就会看到。
Here's my code:
这是我的代码：
if (var n = Math.floor((Math.random() * 1000) + 1); {
var output = "";
if (n % 3 == 0)
output += "Rock";
if (n % 5 == 0)
output += "star";
prompt(output || n);
}
Why isn't my code working properly?
为什么我的代码不能正常工作？
回答by Burning Crystals
var n = Math.floor((Math.random() * 1000) + 1);
if (n) {
var output = "";
if (n % 3 == 0)
output += "Rock";
if (n % 5 == 0)
output += "star";
prompt(output || n);
}The varinside the ifstatement is a syntax error. My browser shows this error:
在var里面if的语句是一个语法错误。我的浏览器显示此错误：
SyntaxError: expected expression, got keyword 'var'
So I think you should declare variable nbefore telling the ifstatement that var nis your comparison expression.
所以我认为你应该n在告诉你的比较表达式的if语句之前声明变量var n。
