Talk about passing in time delta in Update Method chapter

[munificent]

Toon324 suggests:

this is a highly useful idea and it is very easy to understand. I would simply expand it with the idea of passing a delta time variable and using that to calculate various things.

[munificent]

Users Figs also suggests:

I usually favor a dt variable to make time accumulation simpler to reason about. Maybe worth mentioning as a design choice?

[dogfuntom]

Why only delta? I find useful to pass total time as well.