澄清if语句

Question

获得该代码：

function orderMyLogic(val) {
  if (val < 10) {
    return "Less than 10";
  } else if (val < 5) {
    return "Less than 5";
  } else {
    return "Greater than or equal to 10";
  }
}


console.log(orderMyLogic(7));
console.log(orderMyLogic(4));
console.log(orderMyLogic(11));

结果是

Less than 10
Less than 10
Greater than or equal to 10

我理解为什么会这样，但是语法上有哪些选项（如果有） 我可以接受，这样他们的结果将与下面的代码相同 而不更改（val <10）和（val <5）的位置

function orderMyLogic(val) {
  if (val < 5) {
    return "Less than 5";
  } else if (val < 10) {
    return "Less than 10";
  } else {
    return "Greater than or equal to 10";
  }
}

console.log(orderMyLogic(7));
console.log(orderMyLogic(4));
console.log(orderMyLogic(11));

结果将是：

Less than 10
Less than 5
Greater than or equal to 10

Answer 1

对于没有if语句的解决方案，可以将conditional (ternary) operator ?:与值一起使用。

function orderMyLogic(val) {
    return val < 5
        ? "Less than 5"
        : val < 10
            ? "Less than 10"
            : "Greater than or equal to 10";
}

console.log(orderMyLogic(7));
console.log(orderMyLogic(4));
console.log(orderMyLogic(11));