rounding a bullet angle to 16 directions

Hello, I am attempting to try and limit the rotation of a spawned bullet to 16 directions, which I believe is steps of 22.5 degrees, however I am not sure how to implement the correct "round" syntax and math for this..

I have bullets spawning toward the player, so I assume I would implement the "rounding" (whatever the correct syntax is) after that action?

Hope someone is willing to assist.

I don't know when you set the angle but this is an example how you round it to 22.5 degree intervals

round(bullet.angle)/22.5)*22.5

So you can do something like this to get a 360 degree spread in 16 directions:

On bullet created --> set angle to: round(random(0,360)/22.5)*22.5

Thankyou so much!