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awk print using a variable

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# 1  
Old 02-07-2012
awk print using a variable
hey,

just want to ask how to do this.

ex.
Code:
g="hi i am john"
h=`echo $g | awk '{print $2}'`
echo $h

OUTPUT is 'i'

What if I want to use a variable instead of using '2', how do I do that?
Because this one does not work:
Code:
a=2
h=`echo $g | awk '{print ${$a}}'`

this one also does not work:
Code:
a=2
h=`echo $g | awk '{print $a}'`

anyone? thanks!
Last edited by Franklin52; 02-08-2012 at 06:19 AM.. Reason: Please use code tags for code and data samples, thank you
# 2  
Old 02-07-2012
Code:
a=2
g="hi i am john"
h=`echo $g | awk -v i=$a '{print $i}'`

This User Gave Thanks to balajesuri For This Post:
h0ujun
# 3  
Old 02-08-2012
Quote:
Originally Posted by balajesuri
Code:
a=2
g="hi i am john"
h=`echo $g | awk -v i=$a '{print $i}'`

cool..thanks!
# 4  
Old 02-08-2012
In shell that supports arrays (bash/ksh):
Code:
g="hi i am john"
i=2
h=( $g )
echo "${h[ $((i-1)) ]}"

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