Number Divisibility Help (Trying to do a check)

[Demonic]

Alright I got two numbers (numbers might change)

 

Anyways lets say we got the number 9, I want to check say if 4 can go into nine equally.

 

If not I want to see how many we need to add before it can be divisible by 4 evenly

 

I got an idea actually, let me try writing a function.  In the mean time post ur outcome if you know something quicker.

 

This is what I came up with:

 

function number_divisibility($num1,$num2)
{
$save = 0;
if($num1 % $num2 == 0) return 0;
if($num1 % $num2 != 0)
{
	while(True)
	{
		$save++;
		if(($num1+$save) % $num2 == 0) return $save;
	}
}
}

[btherl]

The number you need to add is (4 - ($num1 % $num2)).

 

$save = $num2 - ($num1 % $num2);

[Demonic]

hmm, never thought of it like that

[sasa]

$save = ($num1 % $num2) ? $num2 - ($num1 % $num2) : 0;

[roopurt18]

$save = ($tmp = ($num1 % $num2)) ? $num2 - $tmp : 0;

 

Might as well save an operation while we're at it!