View Full Version : Checking for a whole number

WillowFae

10-27-2003, 04:34 PM

Is there anyway I can check if a number is a whole number?

I am retrieving images from a database and on every third image I want to start a new row in the table displaying them. I have set $i to be 0 and increased it with every reiteration of the loop. After having increased it I want to check if $i divided by 3 produces a whole number or not.

How do I do this?

Thanks

WillowFae

Acecool

10-27-2003, 04:53 PM

If you want the whole number every time:

round($variable, 0);

1.3423

would return

1

IF, you just want to see if its a full number or has a .

$blah = explode("\.", $variable);

if $blah[1] == "" then

the number is whole

else then

the number is not whole

end if

or something

coffeedemon

10-27-2003, 04:56 PM

if(eregi("\.", $i))

{

echo "not a whole number";

}

else

{

echo "is a whole number";

}

if $i has a "." it will not be considered a whole number.

coffeedemon

10-27-2003, 05:02 PM

or you can just use

<?php

round($i);

?>

which will round the number to a whole number.

WillowFae

10-27-2003, 05:05 PM

Ooh, thanks for those. Just what I wanted - the checking option, not the rounding up one.

:)

bcarl314

10-27-2003, 06:09 PM

Originally posted by coffeedemon

if $i has a "." it will not be considered a whole number. [/B]

Ahh, but mathematically speaking, a whole number is...

"a positive integer", so

-1 although it would pass your code, is not a whole number. Neither is 0. So you would need to do an additional test to see if the number is > 0. If so, then it's whole.

Just getting picky :D

amskape

06-17-2010, 02:06 PM

Hi Friends,

There is a Better and Faster Method than preg_match for whole number

validation. that is : ctype_digit().... It take only String parameter , so make

our input as String First like eg:

$var = (string)$value;

then You can Check like this:

if (ctype_digit($var) ){

print "whole number\n";

}else{

print "not whole number\n";

}

ok Be happy , if any clarification Revert to me

anes.pa@gmail.com

Bye Anes

tomws

06-17-2010, 02:30 PM

...the hell? This is a 7 year old post!

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