Find Lines Containing String

Search through text to find lines containing specific strings or patterns. Supports regular expressions, case-insensitive matching, and whole word searches.

📚 Regular Expression Quick Reference:

^word - starts with "word"
word$ - ends with "word"
word.*test - "word" followed by "test"
\d+ - one or more digits
[a-z]+ - lowercase letters
word|test - "word" OR "test"