B- There are three types of brackets used in regular expression.
Square Bracket - Specify the character which needs to be
matched
Curly Bracket “{”
- Specify how many character
Para thesis - Specify for Grouping
C -Carrot “^” the start of regular expression
D –Dollar “$” the end of the regular expression
Eg. ^[a-g]{3}$
Above example will allow to enter character between a to g with maximum three character.
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