However, I'm missing some inheritance piece here or global variables since if I run this second smaller function to add 01 to millisecond 999 it replaces 999 with 01, it doesn't add to it.

Environment variables hold important data that may be required by certain processes. Here's how you can configure them in ...

Python is a great language for beginners to learn, and mastering variables and data types is a crucial step in becoming proficient in Python programming.