tit1819202204
/
03语法结构.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
  var score=88;
  if(score>=90&&score<=100){
    alert("优秀");
  }else if(score>=80){
    alert("良好");
  }else{
      alert("自己补全")
  }
  alert(88/10);//8.8
  //9*9乘法表
  for(var i=1;i<=9;i++){

      for(var j=1;j<=i;j++)
      {
          document.write(j+"*"+i+"="+(j*i)+"&nbsp;&nbsp;&nbsp;&nbsp;")
      }
      document.write("<br/>")
  }
  //while(条件){循环体}     死循环
  let k=1;
  while(true){
      //循环体
      if(k>=10) break;
      document.write(k+"<br/>");
      k++;
  }
  //break;continue;
  //break;    终止内层循环
  //continue;    终止本次循环
</script>
</body>
</html>