1.目的
- if else
- switch
- for
- while
- do while
2.示例代碼
圖片及源碼的github鏈接
007.判斷語句和循環語句
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>007.判斷語句和循環語句</title>
<script type="text/javascript">
// if else
iNum = 1;
if(iNum === 1){
alert("1");
}
else if(iNum === 2){
alert("2");
}
else{
alert("other");
}
// switch
var a = '2';
switch (a ){
case '1':
alert('a = 1');
break;
case '2':
alert('a = 2');
break;
default:
alert('default');
}
// for
for(var i = 10; i > 9; --i){
alert("for" + i);
}
// while
var b = 1;
while(b < 2){
alert("while" + b);
++b;
}
// do while
a = -1;
do{
alert("do while" + a);
++a;
}while(a < 1);
</script>
</head>
<body>
</body>
</html>