我的语法错误在哪里？ JavaScript的

Question

var userChoice = function(answer) 
{
    prompt("Do you choose rock, paper, or scissors?");
}
var computerChoice = Math.random()
console.log(computerChoice)
if (computerChoice is between 0 and 0.33) {
    computerChoice = "rock";
} else if (computerChoice is between 0.34 and 0.66) {
    computerChoice = "paper";
} else {
    computerChoice = "scissors";
}

我得到了

  

SyntaxError：意外的标识符

我的错误在哪里？

Answer 1

没有“介于”之间的操作员。您需要使用>=和<=，如下所示：

var userChoice = function(answer) 
{
    prompt("Do you choose rock, paper, or scissors?");
}
var computerChoice = Math.random()
console.log(computerChoice)
if (computerChoice >= 0 && computerChoice <= 0.33) {
    computerChoice = "rock";
} else if (computerChoice >= 0.34 && computerChoice <= 0.66) {
    computerChoice = "paper";
} else {
    computerChoice = "scissors";
}

Answer 2

如果您打算使用某种语言，请花一些时间查找语法。

没有＆＃39;是......和＆＃39;构造

您必须使用逻辑AND，就像一些评论所指出的那样：

if (computerChoice > 0 && computerChoice < 0.33)

Answer 3

无需测试下限。

试试这个：

var userChoice = function(answer) {
    prompt("Do you choose rock, paper, or scissors?");
};

userChoice();
var computerChoice = Math.random();

if (computerChoice < 0.33) {
    computerChoice = "rock";
} else if (computerChoice < 0.66) {
    computerChoice = "paper";
} else {
    computerChoice = "scissors";
}
console.log(computerChoice);