How to build a regular expression that match all characters with limit of 3 carriage return only?

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I have a multi text area for the label called "Description" and that could match all characters,digits and special characters. Only condition is that it could have only maximum of 3 carriage return. If we have 4 carriage return hit, it should not match.

Eg : Valid case
123abc
fgtu566
ftuu344

Invalid Case (It should nonmatch since it have 4 carriage return)
123abc
fgtu566
ftuu344
ffrrtt3333

What I have tried:

Eg : Valid case
123abc
fgtu566
ftuu344

Invalid Case (It should nonmatch since it have 4 carriage return)
123abc
fgtu566
ftuu344
ffrrtt3333

Posted 24-Oct-22 6:20am

savi135

Updated 27-Oct-22 20:46pm

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Comments

Sandeep Mewara 25-Oct-22 1:03am

In regex you can use the \r to catch the carriage return. For every input, see how many of it is there and accordingly act. BTW, for newline, it's \n.

Richard Deeming 25-Oct-22 7:56am

The What I have tried section is where you are supposed to show us what you have tried, and explain where you are stuck. Just repeating your two sample test cases suggests you've tried nothing, and want someone to do all the work for you.

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How to build a regular expression that match all characters with limit of 3 carriage return only?

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