JavaScript。为什么需要在第 2 行添加 return 关键字？... 12 是 MATIC 数字，它将被 4 除

Question

在第 2 行中，为什么需要在那里放置 return 关键字？... 12 是 MATIC 数字，它将被 4 除...

var quarter =function(number) {
    return number/4};  //why need to put return keyword here ?... 12 is MATIC number and it will be divided by 4 ...

if (quarter(12) % 3 === 0 ) {
  console.log("The statement is true");
} else {
  console.log("The statement is false");
}

Answer 1

否则该函数在调用时将不会返回输出值。例如，您可以在函数内执行多个语句，例如:

var quarter =function(number) {
    var foo = "bar",
        person = "john doe";

    return number/4;
}

调用quarter(12)仍然会返回相同的结果。你也可以这样做

var quarter =function(number) {
    var result = number / 4;

    return result;
}

例如