我在 javascript 中使用 try 和 catch 语句时遇到问题 [重复]

Question

我正在制作一个程序，询问用户是否要计算距离、速度或时间，然后根据答案，程序要求用户输入值并进行计算。如果给出的值不正确，我很难让程序重复。

//This program asks the user to input whether they would like to calculate distance, time or     speed.
//Depending their answer they get asked to input the values of the other two options
//The program then calculates either the speed, distance or time
//it is in a try incase that there is an error
try {
  let question = prompt("Would you like to calculate Distance(km), Time(h) or Speed(kph)");
  let answer = question.toLowerCase();
  if (answer === "distance") {
    let time = Number(prompt("Please enter your time in hours:"));
    let speed = Number(prompt("Please enter your speed:"));
    let calculation = speed * time;
    console.log(`The Distance is: ${calculation} km`);
  } else if (answer === "time") {
    let distance = Number(prompt("Please enter your distance:"));
    speed = Number(prompt("Please enter your speed:"));
    let calculation2 = distance / speed;
    console.log(`Your Time is: ${calculation2} hours`);
  } else if (answer === "speed") {
    distance = Number(prompt("Please enter your distance:"));
    time = Number(prompt("Please enter your time in hours:"));
    calculation3 = distance / time;
    console.log(`Your speed is: ${calculation3} kph`)
  }
} catch (e) {
  console.log("The code did not run properly. You did not enter the correct value.")
  question = prompt("Would you like to calculate Distance(km), Time(h) or Speed(kph)");
  answer = question.toLowerCase();

}

Answer 1

可以在函数中写代码，出错了再调用函数（递归）