Does anyone know how I would go about rounding a float to the nearest 0.5 (for example 10.4 would become 10.5, and 32.6 would become 32.5, and 101.9 would become 102 etc). I understand how to round floats / convert them into whole integers but cannot find a solution to rounding to the nearest 0.5 float.

Any help will be greatly appreciated!

@BenJackson The patch below will do it, but I bet there is an object already in extended..... or a simpler method!
There is.... ......... [list-round 0.5]
As you don't need to deal with lists you can extract its essential juices......

If you need to tweek the rounding thresholds......
round_half.pd

propably the same but without expr:

[* 2]
|
[+ 0.5]
|
[i ]
|
[/ 2|