Regular Expressions: A Practical Guide for Beginners
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Local processingInteractive Regex Tutorial
The simplest regex matches literal characters. /cat/ matches the substring "cat" anywhere in the input. Regex is case-sensitive by default; add the i flag to ignore case.
Regex Tester
//
2 matches
I have 42 apples and 7 oranges.
Match details
| # | Match | Index | Groups |
|---|---|---|---|
| 0 | 42 | 7 | — |
| 1 | 7 | 21 | — |
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