How to write conditions in regex?

@darrion.kuhn 

Conditions in regex can be written using nested parentheses and the pipe symbol (|) to specify multiple alternatives. Here is an example of how to write conditions in regex:

For example, if we want to match a string that starts with either "hello" or "hi", followed by either "world" or "universe", we can write the following regex pattern:

^(hello|hi)s(world|universe)$

In this pattern:

• ^(hello|hi): This part matches either "hello" or "hi" at the beginning of the string.
• s: This matches any whitespace character.
• (world|universe)$: This part matches either "world" or "universe" at the end of the string.

By using parentheses and the pipe symbol, we can create conditions in regex to match specific patterns in a string.