Question

当我运行以下代码时：

var creditCheck = function(income) {
    if (income >= 100) {
        return console.log("You earn a lot of money! You qualify for a credit card.");
    }
    else {
        return console.log("Alas you do not qualify for a credit card. Capitalism is cruel like that.");
    }
};
creditCheck("75");
creditCheck("125");
creditCheck("100");

我明白了：

Alas you do not qualify for a credit card. Capitalism is cruel like that.
You earn a lot of money! You qualify for a credit card.
You earn a lot of money! You qualify for a credit card.
Alas you do not qualify for a credit card. Capitalism is cruel like that.

为什么变量没有给出正确的输出？

Answer 1

不要使用

creditCheck("75");

相反，请使用

creditCheck(75);

使用引号，您将字符串传递给方法。你想传递一个数字。但是，在这种情况下，JavaScript无关紧要，因为JavaScript会自动转换它。你可能在你的问题中遗漏了一些东西;请发布完整的代码和输出。

Answer 2

您在问题中发布的输出不是JavaScript控制台的输出，而是codeacademy.com editor的输出因此使我们无法理解哪个是问题。

你应该完全改变你的问题。但是，使用此代码可以正常工作。

var creditCheck = function(income) {
    if (income >= 100) {
        return ("You earn a lot of money! You qualify for a credit card.");
    }
    else {
        return ("Alas you do not qualify for a credit card. Capitalism is cruel like that.");
    }
};
creditCheck("75");
creditCheck("125");
creditCheck("100");

JavaScript信用卡免税额无效

2 个答案: