
򣨷dwbody䣩

<script>

var price=prompt("۸");
var count=prompt("");
var pay=prompt("븶");
var total=price*count;
var change=pay-total;

var ssss="۸ "+price+"  "+count+" ܼ "+total+"  "+change;
alert(ssss);

</script>


¿Σ

1if

if(){ʱҪ}
һ£ִУִ

if(){}else{}
£ִif룬ִelse

if

2ϵ

> >= < <= == != === !==

3ϵ   ֵ true false


Ҫ
1ܼ۳1000Ԫ10008
2㵯

Ϊʱ   ""+ change

























