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# 1  
Old 03-05-2007
regular expressions
Hi Gurus,

I need help with regular expressions. I want to create a regular expression which will take only alpha-numeric characters for 7 characters long and will throw out an error if longer than that.

i tried various combinations but couldn't get it, please help me how to get it guys.

Thanks
# 2  
Old 03-05-2007
Code:
$ echo "123abc7" | grep '^[A-Za-z0-9]\{0,7\}$' || echo ERROR
123abc7
$ echo "123abc78" | grep '^[A-Za-z0-9]\{0,7\}$' || echo ERROR
ERROR

If you want exactly 7 characters, just change the regex to
Code:
'^[A-Za-z0-9]\{7\}$'

Cheers
ZB
# 3  
Old 03-05-2007
thanks for ur reply, it worked..
 
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