PHP: Multiplication without multiplication operator.
Posted on February 2nd, 2010 by Jans
Recently one of my friend asked me to write a function in PHP for multiplying two numbers without * or / operators. Also we should not use any loops. I got the following solution.
function mul($a,$b)
{
if($b==1){return $a;}
return $a+mul($a,$b-1);
}echo mul(5,6);
One more solution which i found is as follows. But is is using the division(/) operator.
function mul($a,$b)
{
return $a/(1/$b);
}echo mul(15,3);
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