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Lesson 13. Validating Data > Validating Sequences

Validating Sequences

A sequence is a string of characters (letters, numbers, and special characters) placed in a specific order or formatted in a special way. Following are some sample sequences:

  • Telephone number (xxx-xxxx)

  • Credit card number (xxxx xxxx xxxx xxxx)

  • Date (xx/xx/xxxx)

  • URL (http://www.xxxxxx.xxx)


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