1

window.onload = function () {
while (true){
var i = 0;
var score = prompt('請(qǐng)輸入小明的成績(jī)');
if (score < 0 || score > 100){
alert('輸入不合法，請(qǐng)重新輸入');
continue;
}
else if(score == 100){
alert('獎(jiǎng)勵(lì)一輛BWM');
break;
}else if (score >= 80 || score <= 99){
alert('獎(jiǎng)勵(lì)一臺(tái)iPhone15s');
break;
}else if(score >= 60 || score <= 79){
alert('獎(jiǎng)勵(lì)一本參考書');
break;
}else{
alert('什么獎(jiǎng)勵(lì)都沒有');
break;
}
i++;
}
}

2

window.onload = function () {
      var i = 1000;
      var j = 0;
      while (true){
          i = i * 1.05;
          f (i >= 5000){
              break;
          }
       j++;
      }
   alert(j);
  }