Key Concepts

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Character Sets in Regular Expressions

Regular expression character sets denoted by a pair of brackets [] will match any of the characters included within the brackets. For example, the regular expression con[sc]en[sc]us will match any of the spellings consensus, concensus, consencus, and concencus.

Introduction to Form Validation
Lesson 1 of 3

What you'll create

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How you'll master it

Stress-test your knowledge with quizzes that help commit syntax to memory

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