Setting a variable to Integer

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Is there a way to set a variable to integer, so i can only get integer numbers?
Example:

$idBlue = (38683000 + ( ($led-led-colour-blue.dimlevel / 100) * 255) )

Sometimes this gets me this: set $idBlue to 38683191.25
But I only want to have a integer number.

I’ve added a round-function.

$idBlue = round(38683000 + ( ($led-led-colour-blue.dimlevel / 100) * 255) )

@sweetpi thank you very much