[SOLVED] Add/Subtract depending on positive/negative number?

[ChadNomad]

How do I know if a number is positive or negative? For example if the integer is 10 I want to + 10 and if it's -16 I want to - 16...

 

Hope that makes sense!

[corbin]

Luckily, the way positive and negative numbers works, you can do the following:

 

$a + $b

 

Let's say a is 10 and b is 9, that will yield 19....  Let's say b is -9....

 

10+-9

That would be 1 ;p.

[thebadbad]

For your particular example, you could just multiply the number with 2!

 

<?php
$num *= 2;
echo $num; //outputs 20 when $num = 10, and -32 when $num = -16.
?>

 

If that's not what you needed, let me know

[ChadNomad]

Luckily, the way positive and negative numbers works, you can do the following:

 

$a + $b

 

Let's say a is 10 and b is 9, that will yield 19....  Let's say b is -9....

 

10+-9

That would be 1 ;p.

 

Yeah I just noticed that! Thanks