Regex Series: 5-Digit Zip Code

Published by Helen Yu in
regexstrings

Write a regular expression that matches a string if and only if it is a valid zip code.

Examples

"32554" ➞ true

"92 342" ➞ false
// Invalid: contains a whitespace

"9@342" ➞ false
// Invalid: contains a non-numeric character

"923444" ➞ false
// Invalid: length is not 5

Notes

  • Zipcodes must be 5 digits long exactly and only contain numbers.
  • Not allowed: non-numeric characters or whitespaces.
  • This challenge is designed to use Regex only.
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