js 学习之路6： if...else...条件语句的使用

1.1

if (...)

{

...

}

else

{

...

}

<!DOCTYPE html>
<html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<body>

<script charset = "utf-8">

function myfunction(){
    var x = 11;
    var y = x % 2;
    document.write(y + "<br>");
    if (x % 2 == 1){
        document.write("单数");
    }
    else
    {
        document.write("双数");
    }
}

myfunction();

</script>

</body>
</html>

1.2

if (条件1)

{

...

}

else if (条件2)

{

...

}

else

{

...

}

<!DOCTYPE html>
<html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<body>

<script charset = "utf-8">

function myfunction(x){
    var y = x % 2;
    if (x % 2 == 0){
        document.write("双数");
    }
    else if (x > 10)
    {
        document.write("大于10的单数");
    }
    else
    {
        document.write("普通单数");
    }
    
    document.write("<br>");
    document.write(x);
}

myfunction(15);

</script>

</body>
</html>

 

posted @ 2019-01-28 13:41  正态分个布  阅读(948)  评论(0)  编辑  收藏  举报