JavaScript条件语句if/else /else

Question

大家好！你能帮帮我吗？我试图利用某些条件，但由于某些原因，这些条件似乎被忽视了。当我运行该代码时，给出的弹出式随机数为93，它符合第一个声明语句(if)，但是，即使在true && true时，它也被忽略并移到最后一个语句。我不明白为什么..。？

function loveMatching (name1, name2) {
    
    name1 = prompt ("Enter your name!");
    name2 = prompt ("Enter your crush name!");

   
 if (matchingPercentage() >= 70 && matchingPercentage() <=100) {

   document.write(" The compability between: " + name1 + " and " + name2 + " is of a " + matchingPercentage() + "%. You guys are meant to be together!");

  }
  else if( matchingPercentage() >=30 && matchingPercentage() <70) {
    document.write(" The compability between: " + name1 + " and " + name2 + " is of a " + matchingPercentage() + "%. Too close to fail!");
  }

 else {
  document.write(" The compability between: " + name1 + " and " + name2 + " is of a " + matchingPercentage() + "%. You better look in another direction!");
 }

  }

function matchingPercentage() {
    var n = Math.random();
    var n = Math.floor(n * 100) + 1;
return n;
}



loveMatching();

Answer 1

每次检查它时，您都要计算一个新的匹配%，在同一条件下多次计算。一开始你只需要做一次：

function loveMatching (name1, name2) {
    
    name1 = prompt ("Enter your name!");
    name2 = prompt ("Enter your crush name!");
    const matchPercent = matchingPercentage(); // call one time
   
 if (matchPercent >= 70 && matchPercent <=100) {

   document.write(" The compability between: " + name1 + " and " + name2 + " is of a " + matchPercent + "%. You guys are meant to be together!");

  }
  else if( matchPercent >=30 && matchPercent <70) {
    document.write(" The compability between: " + name1 + " and " + name2 + " is of a " + matchPercent + "%. Too close to fail!");
  }

 else {
  document.write(" The compability between: " + name1 + " and " + name2 + " is of a " + matchPercent + "%. You better look in another direction!");
 }

}