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Ever wondered how the search or replace button works? They are very useful commands. 

For beginners and professionals alike, we use these commands in our day-to-day work life, at least once a day. This is why I felt the need to build a course that could help you increase your knowledge and save time while working with strings or any sort of text.

The objective of this course is to help you get a strong grip on regular expressions, or in shorthand, regex. Instead of writing repetitive tasks, it mainly focuses on efficient searching in text files.

Regular Expressions for Programmers

## Character range

Recall the RegEx you wrote in the previous problem `/98[12][0123456789]/g`. Consider the case when you need to match huge integers or alphabets. Writing all the alphabets one by one in a character set would be very tedious. As a solution, another unique character, the hyphen`"-"`, is used to express the range. Instead of writing digits or alphabets one by one, you can use this range of characters. 

# Character range

Recall the RegEx you wrote in the previous problem `/98[12][0123456789]/g`. Consider the case when you need to match huge integers or alphabets. Writing all the alphabets one by one in a character set would be very tedious. As a solution, another unique character, the hyphen`"-"`, is used to express the range. Instead of writing digits or alphabets one by one, you can use this range of characters. 

Learn about the anti of the character set to create a more precise RegEx.

Introduction to RegEx

Characters

Character Set

Repetition Character

Grouping and Alteration Character

Anchor Character

Concepts about RegEx

Conclusion

Assessment 1

Negative Character Set

Character range