Math.floor

[Henke]

I wanna round an value in a javascript Down to nearest hundred.
For example: 3234 = 3200 and 3890 = 3800
Always down and to hundred.
I have tried Math.floor but that just round down to ten.
Is there any way 2 do this??

Regards
/Henke

[Mick White]

Re: Math.floor

Henke wrote:
[color=blue]
> I wanna round an value in a javascript Down to nearest hundred.
> For example: 3234 = 3200 and 3890 = 3800
> Always down and to hundred.
> I have tried Math.floor but that just round down to ten.
> Is there any way 2 do this??
>[/color]

Math.floor(numb er/100)*100

Mick

[McKirahan]

Re: Math.floor

"Henke" <hlo@thomsonfak ta.se> wrote in message
news:b3f1830e.0 501130551.4a0c2 966@posting.goo gle.com...[color=blue]
> I wanna round an value in a javascript Down to nearest hundred.
> For example: 3234 = 3200 and 3890 = 3800
> Always down and to hundred.
> I have tried Math.floor but that just round down to ten.
> Is there any way 2 do this??
>
> Regards
> /Henke[/color]

alert(parseInt( 3234/100,10));
alert(parseInt( 3890/100,10));

[Lee]

Re: Math.floor

Henke said:[color=blue]
>
>I wanna round an value in a javascript Down to nearest hundred.
>For example: 3234 = 3200 and 3890 = 3800
>Always down and to hundred.
>I have tried Math.floor but that just round down to ten.
>Is there any way 2 do this??[/color]

Several, including n-n%100;

[Dr John Stockton]

Re: Math.floor

JRS: In article <q_6dnbZ_hPYiHn vcRVn-jg@comcast.com> , dated Thu, 13 Jan
2005 08:22:05, seen in news:comp.lang. javascript, McKirahan
<News@McKirahan .com> posted :[color=blue]
>"Henke" <hlo@thomsonfak ta.se> wrote in message
>news:b3f1830e. 0501130551.4a0c 2966@posting.go ogle.com...[color=green]
>> I wanna round an value in a javascript Down to nearest hundred.
>> For example: 3234 = 3200 and 3890 = 3800[/color][/color]
[color=blue]
>alert(parseInt (3234/100,10));
>alert(parseInt (3890/100,10));[/color]

That involves an implicit conversion to String and an explicit
conversion back to Number; it should be slower than a pure mathematical
method. Also, it gives an incorrect answer.

If the OP happens to want a string result,
x = String(N/100).replace(/\..*./, '')+'00'
could be speed-tested; but the result may be unsatisfactory for N<100.

If negative numbers are possible, should -777 go to -700 or -800 ?

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