How to write a Regular Expression for an Email-ID and a Mobile Number

Опубликовано: 26 Декабрь 2024
на канале: Ocean of Code

237

In today's video, we are going to learn about regular expressions. How to write a regular expression for an email id and mobile number. Explained all minute details.

Very basic concepts about Regular Expressions:
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1. /^[a-z]$/
This expression will match only 1 lower case alphabet from a to z.

2. /^[a-z]+$/
This expression will match at least one or more lower case alphabets from a to z.

3. /^[a-z]*$/
This expression will match zero or more lower case alphabets from a to z.
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Regular Expressions site:
https://regexr.com/

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Regular Expressions discuseed in this video with Timestamps:
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1. 03:36 How to write a regular expression for an email id
2. 11:26 How to write a regular expression for a mobile number
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Regular Expressions taught in this video:
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1. For an Email-id:
/^([a-zA-Z0-9_\-\.]+)@([a-zA-Z0-9_\-\.]+)\.([a-zA-Z]{2,5})(.[a-zA-Z]{2,5})?$/

2. For a mobile number:
/^[0-9]{10}$/
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Few shortcuts for regular expressions' ranges:
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/s : matches any whitespace characters such as space and tab
/S : matches any non-whitespace characters
/d : matches any digit character
/D : matches any non-digit characters
/w : matches any word character (basically alpha-numeric)
/W : matches any non-word character
/b : matches any word boundary (this would include spaces, dashes, commas, semi-colons, etc)
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#RegularExpressions #BasicsOfRegularExpressions #HowToWriteARegularExpressionForAnEmailID #HowToWriteARegularExpressionForAMobileNumber #Learn Regular Expressions in just 10 minutes with an Email-ID and Mobile Number as examples
#Learn Regular Expressions in just 10 minutes #RegularExpressionsFromBasics #Whatisregularexpressions

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