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Extract digits at end of string

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# 1  
Old 11-20-2006
Extract digits at end of string
I have a string like xxxxxx44. What's the best way to extract the digits (one or more) in a ksh script?

Thanks
# 2  
Old 11-20-2006
elaborate your question.
can u elaborate your question /provide some sample input.
what do u want to do exactly?
# 3  
Old 11-20-2006
Try...
Code:
var1="xxxxxx44"
var2=$(expr $var1 : "[^0-9]*\([0-9]*\)")

# 4  
Old 11-20-2006
Extraction of the trailing digits :
Code:
var=xxxxx44
digits=${var#${var%%*([0-9])}}


Jean-Pierre
# 5  
Old 11-20-2006
how about this,

Code:
echo "abcde444" | sed 's/[a-z]//g'

# 6  
Old 11-20-2006
Ygor and matrixmadhan, your solutions works fine, but only if the trailing digits are prefixed by non digit characters.

For example :
Code:
var="xxx1xxx44"
expr $var1 : "[^0-9]*\([0-9]*\)"   # => Gives 1
echo $var1 | sed 's/[a-z]//g'        # => Gives : 144


Jean-Pierre.
# 7  
Old 11-20-2006
Quote:
Originally Posted by matrixmadhan
how about this,

Code:
echo "abcde444" | sed 's/[a-z]//g'


Thanks - that's just what I was trying to do.

Thanks all for your replies
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