Bookmark Us
Kids Search. The Best Search Engine for K-12 Kids and Children.   
 

   web | images | video | facts | wiki | news | games | kidztube | apps





report a search problem





COMPANY RESOURCES LINKS SOCIAL
contact us education daily journal home facebook
about us make us your default search kidztalk twitter  
terms/privacy blocking websites kidznet pinterest  
advertise teacher zone wiki    
media link to us learning sites    
business / api solutions add a site image search    
affiliate program kidzsearch apps kidztube    
play youtube on kidzsearch games    
  voice search music    
  report a problem cool facts    
  settings news    
    search help    
    kidznet directory    
         










 mobile version

      Copyright 2005-2020 KidzSearch.com 
Regular_expression

A regular expression (abbreviated regexp or regex) is a way to describe sets of characters using syntactic rules. Many programming languages use or support regular expressions. A regular expression is then used by a special program or part of a programming language. This program will either generate a parser that can be used to match expressions or it will match such expressions itself.

regular expression processor is used for processing a regular expression statement in terms of a grammar in a given formal language, and with that examines a text string.

A few examples of what can be matched with regular expressions:

  • The sequence of characters "car" appearing consecutively in any context, such as in "car", "cartoon", or "bicarbonate"
  • The sequence of characters "car" occurring in that order with other characters between them, such as in "Icelander" or "chandler"
  • The word "car" when it appears as an isolated word
  • The word "car" when preceded by the word "blue" or "red"
  • The word "car" when not preceded by the word "motor"
  • A dollar sign immediately followed by one or more digits, and then optionally a period and exactly two more digits (for example, "$10" or "$245.99"). view more...