08 Exact counts

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Goal

Match phone numbers written like 555-0134: three digits, a hyphen, four digits.

Curly braces give exact counts: \d{3} is exactly three digits. {2,4} is between two and four, and {2,} is two or more.

They're how you avoid writing \d\d\d\d, and they make the pattern read like the format it describes.

Try it

Match the phone numbers, and nothing that's a digit short.

Hint

/\d{3}-\d{4}/.

Show a solution

This interactive environment needs JavaScript. Everything you need to read is on this page, and the solution works the same way for real.

Regex

Starting Regex…