JavaScript while ??
while ??? JavaScript?? ?? ??? ?????. ??? ??? ????.
while(expr){
?
}
? ??? expr ???? TRUE? ? ?? ?? ??? ?? ?????. expr? FALSE? ? ??? ???? ??? ???? ??? ?????.
?? ???? while ??? ???? 1~10? ?????.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文網(wǎng)(php.cn)</title>
<script type="text/javascript">
var i = 1;
while (i <= 10) {
document.write(i + "<br />");
i++;
}
</script>
</head>
<body>
</body>
</html>?? ??:
1
2
3
4
5
6
7
8
9
10
do while ??
do while ??? while ??? ?? ?????. ??? ???? do while? ? ?? ????? ????. ?? while? ???? ???? ??? ???? ?? ?? ? ????. ?? ??.
do while ?? ??:
do {
?
}while (expr)
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文網(wǎng)(php.cn)</title>
<script type="text/javascript">
var i = 1;
do {
document.write(i + "<br />");
i++;
} while (i <= 10);
</script>
</head>
<body>
</body>
</html>for? while ??
for ??? ?? ?? ?? ???? ??? ???? ? ????. while ??? for ??? ?? ?????.
for ?? ??
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文網(wǎng)(php.cn)</title>
</head>
<body>
<script>
cars=["BMW","Volvo","Saab","Ford"];
var i=0;
for (;cars[i];){
document.write(cars[i] + "<br>");
i++;
}
</script>
</body>
</html>while ?? ??
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>php中文網(wǎng)(php.cn)</title>
</head>
<body>
<script>
cars=["BMW","Volvo","Saab","Ford"];
var i=0;
while (cars[i]){
document.write(cars[i] + "<br>");
i++;
}
</script>
</body>
</html>
