Discussing a regular expression and its importance

A regular expression or pattern matching is nothing but a way in which we can check whether an input string is correct or not. This is possible with the use of the Regex class of the System.Text.RegularExpressions namespace.

The Importance of a regular expression

Pattern matching is very important while we are working to validate text input. Here, regular expression plays an important role.

Flexible

Patterns are very flexible and provide us with a way to make our own pattern to validate the input.

Constructs

There are various constructs that help us define the regular expression. Hence, we need to make them important in our programming where we need validated input. These constructs are character classes, character escapes, quantifiers, and so on.

Special characters

There is a huge usage of regular expressions in our day-to-day programmings and that why regular expressions are important. Here are various scenarios as per their usage, where special...