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how can i just take 1 number after the . ? example 5.232332 i want to get 5.2

Posted on 2008-10-01
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Last Modified: 2008-10-02
how can i just take 1 number after the . ? example 5.232332 i want to get 5.2
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Question by:mgtm3
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LVL 24

Accepted Solution

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glcummins earned 250 total points
ID: 22616164
You can use round() (http://www.php.net/round):
round(5.232332, 1);

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LVL 9

Assisted Solution

by:richdiesal
richdiesal earned 150 total points
ID: 22616226
That's only true if you want to round... if you want THE number after the . (instead of rounding up if the number if above .5, or rounding down if it's below), you could use this code snippet.
$var = 5.232332;
$new = (FLOOR($var*10))/10;

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LVL 24

Assisted Solution

by:glcummins
glcummins earned 250 total points
ID: 22616278
If you are treating the number as a string rather than as a number, here is a more efficient way:

substr(5.232332, 0, 3);

No extra math is needed using this method.
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LVL 11

Assisted Solution

by:bansidhar
bansidhar earned 100 total points
ID: 22616367

$var = 5.232332;
$var = preg_replace('/(\d*\.\d)\d*/','$1',$var);

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LVL 9

Expert Comment

by:richdiesal
ID: 22616385
But it should be noted that glcummins last method only works if you are trying to shorten this specific number.  If the number has more digits before the decimal, it will cut them off.

So, I guess to summarize these methods:

Method 1:
5.232332 shortens to 5.2
Method 2:
5.232332 shortens to 5.2
Method 3:
5.232332 shortens to "5.2"

Method 1:
16.5812 shortens to 16.6
Method 2:
16.5812 shortens to 16.5
Method 3:
16.5812 shortens to "16."
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