SyntaxError：意外的令牌

Question

出于某种原因，意外的令牌不断返回。有关如何解决它的任何想法？

var sleepCheck = function(numHours);

if (numHours>=8)
{
    return "You're getting plenty of sleep!  Maybe even too much!";
}

else
{
    return "Get some more shut eye!";
}

Answer 1

javascript中的函数有{和}的正文分隔符：

var sleepCheck = function(numHours) { // <-- START HERE

    if (numHours>=8)
    {
        return "You're getting plenty of sleep!  Maybe even too much!";
    }
    else
    {
        return "Get some more shut eye!";
    }
}; // <-- END HERE

Answer 2

你的语法错了。试试这个：

var sleepCheck = function(numHours)
{
    if (numHours>=8)
    {
        return "You're getting plenty of sleep!  Maybe even too much!";
    }
    else
    {
        return "Get some more shut eye!";
    }
};