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Even and odd


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#1 Lessur

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Posted 28 July 2006 - 04:02 PM

I want to be able to say, if $blah == even { echo "";).

How can I tell it what even is (like a even number)?

#2 Ninjakreborn

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Posted 28 July 2006 - 04:10 PM

not possible, I don't think a built in function does that, only idea, is auto increment by 2, in an array.  I guess like for 0 - odd number's
start at 1
auto increment it +2, for each and every array entry
it'll be
1
3
5
7
9
11
and set a maximum like 500 for the maximum that should handle most of your needs
then create another array auto increment it by +2 which I think is
++++
++ is auto increment
then run the array through that
until a max 500
so it would be
2
4
6
8
10
and so forth, then pull out some regex's and start working with creating a variable to test it against the array, somehow and try to figure out whether it matched the array on an even number or on a odd number, that's a theory to run with atleast.

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#3 effigy

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Posted 28 July 2006 - 04:57 PM

Modulus Operator.

<?php
	$tests = range(1, 10);
	foreach ($tests as $test) {
		echo "$test: ", ($test % 2 ? 'Odd' : 'Even'), '<br />';
	}
?>

Regexp | Unicode Article | Letter Database
/\A(e)?((1)?ff(?:(?:ig)?y)?|f(?:ig)?)\z/

#4 Ninjakreborn

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Posted 28 July 2006 - 10:45 PM

ah, good idea

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