Match the word "hello" — regex exercise — regexp.cheminfo.org

regexp.cheminfo.org — learn regular expressionsA guided tutorial, a live playground, graded exercises checked against test cases, a printable cheatsheet and a glossary. The tool needs JavaScript, because the regular expressions run in your browser.

Tutorial — the notation, one step at a time

Playground — test a pattern live

Exercises — write the pattern yourself

Cheatsheet — every construct in a table

Glossary — the words they are explained in

About — and regex beyond JavaScript

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