statement.html

《JavaScript网页开发体验式学习教程》的源代码

<!--script>
var x = 30;
//if(typeof(x) == "undefined")
/*if(x)	
{
	var y = x>0?x:-x;
	alert(y);
}
else
{
	alert("空值");
}*/
if(x < 1)
	alert("x<1");
else if(x>=1 && x<10)
	alert("x>=1 && x<10");
else if(x>=10 && x<100)
	alert("x>=10 && x<100");
/*else
	alert("x>=100");*/
</script-->
<script>
/*var x=2;
switch(x)
{
    case 1:
   	  alert("Monday");
      break;
    case 2:
      alert ("Tuesday");
      //break;
    case 3:
      alert ("Wednesday");
      break;
    default:
      alert ("Sorry,I don't know");
}*/

/*var x = 1;
while(x < 3)
{
   alert("x=" + x); 
   x++; 
}*/

/*var output = "";
var x=1;
for(; ; )
{
	if(x>=10)
		break;
	output = output  + "  x=" + x;
	x++;
}*/
var output = "";
for(var x=1; x<10; x++)
{
	if(x%2 == 0)
		continue;
    output = output + "  x=" + x;
}
alert(output);




</script>