AI engineering glossary · Command line Git
What is regular expression?
Regular expression (also called Regex): A compact pattern language for matching text, using symbols such as . for any character, * for repetition and [0-9] for a digit class. Shell tools, editors and programming languages use it to find, validate and extract text.
Regular expression: an example
The pattern ^[0-9]{6}$ matches exactly six digits, such as an Indian PIN code like 560001.
Related terms
More Command line Git terms
Where you learn it
Regular expression is part of the AI Engineering Program, which teaches it with notes, a hands-on lab and an exam. The first lesson is free.