Question

How to check odd or even using simple math in PHP

Answer 1

$n = 10;

if ( (int)($n / 2) * 2 == $n)
    echo "Even";
else
    echo "Odd";
    
/*
run:

Even

*/

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Answer 2

$n = 13;

if ( (int)($n / 2) * 2 == $n)
    echo "Even";
else
    echo "Odd";
    
/*
run:

Odd

*/

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Answer 3

$n = 10;

if (intval($n / 2) * 2 == $n)
    echo "Even";
else
    echo "Odd";
    
/*
run:

Even

*/
   

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Answer 4

$n = 13;

if (intval($n / 2) * 2 == $n)
    echo "Even";
else
    echo "Odd";
    
/*
run:

Odd

*/

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