Setting a variable for use within a template

[Pitman]

​I'm learning a little bit about {vb:set ...} and {vb:raw ... } but I am not quite sure how to accomplish using that to set a custom variable to simple a random number.

I'm trying to do exactly this:

PHP Code:

$randomnum = rand(1,112); 


{vb:set randnum, $randomnum}

Then use the random number inside the same template:

{vb:raw randnum}

I've saw there is a php function for {vb:...}, but it doesn't look like I would be able to accomplish that using that. Is there an easy way to go about doing this?