JavaScript随机数if语句问题 [英] JavaScript random number if statement problem

问题描述

我一直在尝试让系统计算出一个随机数，然后根据生成的数字将一条语句写入屏幕，因此从理论上讲，当出现以下情况时，应该在屏幕上放置一条随机语句页面刷新.
但是，当我刷新页面时，它总是打印第一条语句，而没有其他内容，没有错误，因此我无法弄清为什么会这样.这是我的代码:

Hi, I have been trying to get a system working where a random number is calculated, then a statement is written to the screen depending on the number that was generated, so in theory it should put a random statement on the screen when the page is refreshed.
However, When i refresh the page it always prints the first statement, and no others, There are no error''s so i cannot work out why it is like this. Here is my code:

var fact;
	fact = Math.ceil(Math.random()*4)
	
	if (fact = 1) {
		document.write('Hi');
	}else if(fact = 2){
		document.write('Nope');

所以在那之后基本上还有另外两个语句，但是我不明白为什么它只写第一个语句，而没有其他语句.

So basically there are two more statements after that, But i cant understand why it only writes the first statement, and no others.

推荐答案

将其更改为:

Change it into this:

var fact;
	fact = Math.ceil(Math.random()*4)
	
	if (fact == 1) {
		document.write('Hi');
	}else if(fact == 2){
		document.write('Nope');

使用==运算符比较对象，使用=运算符设置对象的值.
在您的代码中，您没有比较两个变量，但是您在第一个if语句中将fact变量设置为1.

With an == operator, you compare objects and with an = operator, you set the value of an object.
In your code, you didn''t compare the two variables, but you did set the fact variable to 1 in your first if statement.

很容易修复-您确定自己看不到它吗?

好的:

It''s pretty easy to fix - are you sure you can''t see it yourself?

Ok:

if (fact = 1) {

成为

if (fact == 1) {

我们都完成了！ :laugh:

We''ve all done it! :laugh:

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