Truncate a decimal pointed figure without rounding ...

[elyob]

How can I get -0.162058 to -0.1 rather than rounding to -0.2?

I know I'm being stupid here, but it's really bugging me. The number before
the decimal point could 0 - 999

Thanks

[Pedro Graca]

elyob wrote:

> How can I get -0.162058 to -0.1 rather than rounding to -0.2?
>
> I know I'm being stupid here, but it's really bugging me. The number before
> the decimal point could 0 - 999

Something like this?

<?php
function number_trim($x) {
if ($x<0)
return ceil($x);
else
return floor($x);
}

$x = -0.162058;
echo number_trim($x*10), "\n";
?>

--
..sig

[Eric Veltman]

Hello,

elyob wrote:

> How can I get -0.162058 to -0.1 rather than rounding to -0.2?
> I know I'm being stupid here, but it's really bugging me. The number
> before the decimal point could 0 - 999

After making a function myself that was just far more complex
than needed, I saw in the user contributed notes of the manual
that someone contributed a suggestion for such function :

jbeardsl [found_at] gte [d0t] net
08-Nov-2002 01:15
I was looking for a truncate function. Not finding one, I wrote my own.
Since it deals with everything as a number, I imagine it's faster than the
alternative of using string functions. HTH...

function truncate ($num, $digits = 0) {

//provide the real number, and the number of
//digits right of the decimal you want to keep.

$shift = pow(10, $digits);
return ((floor($num * $shift)) / $shift);
}

Best regards,

Eric

[elyob]

"Eric Veltman" <eric@[RemoveThis]veltman.nu> wrote in message
news:vqnuqliq258v4f@corp.supernews.com...

> Hello,
>
> elyob wrote:
>

> > How can I get -0.162058 to -0.1 rather than rounding to -0.2?
> > I know I'm being stupid here, but it's really bugging me. The number
> > before the decimal point could 0 - 999

>
> After making a function myself that was just far more complex
> than needed, I saw in the user contributed notes of the manual
> that someone contributed a suggestion for such function :
>
> jbeardsl [found_at] gte [d0t] net
> 08-Nov-2002 01:15
> I was looking for a truncate function. Not finding one, I wrote my own.
> Since it deals with everything as a number, I imagine it's faster than the
> alternative of using string functions. HTH...

<snip>

Couldn't get this to work. In the end I exploded by the "." and substr'd the
[1]

Thanks for help

[elyob]

"Pedro Graca" <hexkid@hotpop.com> wrote in message
news:bogtui$1cukm8$1@ID-203069.news.uni-berlin.de...

> elyob wrote:

> > How can I get -0.162058 to -0.1 rather than rounding to -0.2?
> >
> > I know I'm being stupid here, but it's really bugging me. The number

before

> > the decimal point could 0 - 999

>
> Something like this?
>
> <?php
> function number_trim($x) {
> if ($x<0)
> return ceil($x);
> else
> return floor($x);
> }
>
> $x = -0.162058;
> echo number_trim($x*10), "\n";
> ?>

Didn't seem to want to work for me ... found a different method (as in other
reply).

Thanks

[Greg]

in php, treat the variable as a string, and use substr($var,0,x), where 0 is the start of the string and x is the number of total 'characters' you want for you number. This assumes you know that you will only have 2 (for example) numbers preceding the decimal.