This character is used to match an expression to its right at the start of a string. There are following different type of characters of a regular expression: The pattern defined by the regular expression is applied to the given string or a text from left to right. It is also used in word processors such as word which helps users for searching the text in a document, and also used in various IDEs. This concept or tool is used in almost all the programming or scripting languages such as PHP, C, C++, Java, Perl, JavaScript, Python, Ruby, and many others. In simple words, you can easily search the pattern and replace them with the matching pattern with the help of regular expression. It is mainly used for searching and manipulating text strings. It is also referred/called as a Rational expression. The regex or regexp or regular expression is a sequence of different characters which describe the particular search pattern. The term Regex stands for Regular expression.
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